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BMW Fuel Injectors Replacement
 
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Pelican Technical Article:

BMW Fuel Injectors Replacement

Nick Czerula

Time:

2.5 hours

Talent:

***

Tools:

Set of sockets (10mm), flathead screwdriver, clean rags

Applicable Models:

BMW 325i Sedan (2006)
BMW 325xi Sedan/Wagon (2006)
BMW 328i Coupe/Conv (2007-13)
BMW 328i xDrive Coupe (2009-13)
BMW 328i xDrive Sedan (2009-11)
BMW 328i xDrive Wagon (2009-12)
BMW 328i/xi Sedan (2007-11)
BMW 328i/xi Wagon (2007-12)
BMW 328xi Coupe (2007-13)
BMW 330i/xi Sedan (2006)
BMW 335d/i/xi Sedan (2007-11)
BMW 335i xDrive Coupe (2009-13)
BMW 335i xDrive Sedan (2009-11)
BMW 335i/is Coupe/Conv (2007-13)
BMW 335xi Coupe (2007-13)

Parts Required:

Fuel Injectors, fuel injector O-rings, fuel injector Teflon seals, steel fuel lines

Hot Tip:

Work with a cool engine and relieve fuel system pressure.

Performance Gain:

Clean and even flowing fuel injectors

Complementary Modification:

Replace with performance injectors

E90 models utilize a single fuel injector per cylinder. Over time injectors can become restricted or fail electrically. If you have an injector giving you a problem, I suggest replacing them in sets of six. This way you maintain an even flow from all the injectors. If you are removing fuel injectors to replace the intake manifold and you plan to reuse the fuel injectors, replace all the fuel injector sealing O-rings.

Normally-aspirated E90 engines utilize standard style fuel injectors that mount in the intake manifold runner and spray fuel on the back side of the intake valves.

Turbocharged E90 engines utilize a direct injection style injector. This style injector sprays fuel directly into the cylinder and is mounted in the center of the cylinder head between the camshafts. These require a few steps and special tools to replace that you may not be familiar with. Be sure to read through the entire procedure before beginning.

In this tech article, I will describe how to replace each style of fuel injector utilized in BWM E90 models.

Normally-aspirated engine

Disconnect negative (-) battery cable. See our tech article on Battery connection notes.

Remove engine covers. See our tech article on removing engine covers.

It's a good idea to relieve fuel system pressure before beginning.
Figure 1

It's a good idea to relieve fuel system pressure before beginning. This will minimize the amount of fuel spilled. The best way to relieve fuel system pressure is to remove the fuel pressure test port cap and press the Schrader valve to drain the fuel rail. (green arrow)

Remove the fuel rail pressure testing cap, then place a rag under the port.
Figure 2

Remove the fuel rail pressure testing cap, then place a rag under the port. Use a small flathead screwdriver and press the Schrader valve to relieve fuel pressure. When you press it, have the rag wrapped around your screwdriver to minimize fuel spillage.

Working at the center of the fuel rail, you will have to remove the fuel supply line.
Figure 3

Working at the center of the fuel rail, you will have to remove the fuel supply line. To release it, press the plastic collar (green arrow) toward fuel line, then slide fuel line off the fuel rail. If the collar will not press in far enough to release the fuel line, pull the fuel line toward the front of the vehicle and hold it there, then press and hold collar while you slide the fuel line off the fuel rail.

I like to place the disconnected fuel line on the valve cover, wrapped in a rag.
Figure 4

I like to place the disconnected fuel line on the valve cover, wrapped in a rag. This will help to collect any excess fuel in the line and also keep dirt from entering the fuel line. (green arrow)

Then release the fuel injector harness strip from the fuel injectors.
Figure 5

Then release the fuel injector harness strip from the fuel injectors. I find the easiest way to do this is to use a large flathead screwdriver and gently pry up at each fuel injector. (green arrows) This will release the spring clips that hold the electrical harness to fuel injectors. When you do this, be sure to lever straight up and be sure the flathead is next to the fuel injector connector you are releasing. Work your way down the injector electrical harness and disconnect each fuel injector.

Next, remove four 10mm fuel rail fasteners (green arrows).
Figure 6

Next, remove four 10mm fuel rail fasteners (green arrows). Then pull fuel rail straight up and out of cylinder head. Be careful not to damage a fuel injector when removing. If O-rings are stuck, you can lightly pry the fuel rail up using a flathead screwdriver. I like to pry between the edge of valve intake manifold and the fuel rail.

To remove individual fuel injectors, remove retaining clip (green arrow) by sliding off fuel rail using a flathead screwdriver.
Figure 7

To remove individual fuel injectors, remove retaining clip (green arrow) by sliding off fuel rail using a flathead screwdriver. Then pull fuel injector straight out of fuel rail. When pulling fuel rail up and out of cylinder head, be careful not to damage any of the fuel injectors. If the injectors won't budge, use silicone spray to lubricate the injector holes, this should help them slide out.

Before reinstalling fuel injectors, replace the sealing O-rings.
Figure 8

Before reinstalling fuel injectors, replace the sealing O-rings. (green arrows)

Before reinstalling fuel injectors, lubricate the sealing O-rings.
Figure 9

Before reinstalling fuel injectors, lubricate the sealing O-rings. I like to use silicone grease that is safe for use on rubber. This helps the injectors slide into the cylinder head with ease.

Evenly press fuel rail with injectors into cylinder head.
Figure 10

Evenly press fuel rail with injectors into cylinder head. Be sure all of the injectors are properly seated. You can confirm this by checking if the mounting tabs (green arrows) are sitting flat on the cylinder head. Install fuel rail fasteners and tighten. Then install fuel injector retaining clips. Be sure the fuel injector retaining clips are fully engaged. They should sit in the groove in the fuel injector and snap onto fuel rail. Reassemble remaining items and check that there are no fuel leaks.

Turbocharged engines

Disconnect negative (-) battery cable. See our tech article on Battery connection notes.

Remove engine covers. See our tech article on removing engine covers.

I am going to show how to replace one fuel injector. You can use this procedure for replacing any or all of the injectors on a turbocharged engine.

Start by disconnecting the fuel injector electrical connector.
Figure 11

Start by disconnecting the fuel injector electrical connector. (yellow arrow) Press the release tab and pull connector straight off. Next you have to remove the steel fuel line for the injector. First, tap on the line about 20 times, lightly to relieve pressure in the line. Then loosen the fuel line connections (green arrows), then remove fuel line from engine. Once this fuel line is removed it cannot be reinstalled. So throw it away immediately.

Working at the base of the fuel injector, remove E10 fastener (green arrow) from retainer.
Figure 12

Working at the base of the fuel injector, remove E10 fastener (green arrow) from retainer. Then remove retainer from fuel injector (yellow arrow). Slide retainer out of fuel injectors to remove. Once retainer is removed, remove fuel injector from engine. To do this, slide injector straight up and out of cylinder head. Note: One retainer holds two injectors. If you are reinstalling this fuel injector, be sure to mark the location that it came out of. When replacing injectors on turbocharged engines, I like to use the old injector to clean the injector bore. I slide the injector in and out of the bore a bunch of times to clean the debris from the hole.

Before installing the new injector, note the numbers on the side.
Figure 13

Before installing the new injector, note the numbers on the side. These numbers will need to be entered into the DME using a BWM scan tool.

When installing a new injector, the Teflon seals will come preinstalled and covered with a protective metal cover (green arrow).
Figure 14

When installing a new injector, the Teflon seals will come preinstalled and covered with a protective metal cover (green arrow). Leave this cover on until you are ready to install the injector. Remove cover, slide injector into cylinder head. Install retainer and retainer fastener. Then install new fuel line to injector. When installing the new fuel line, slowly tighten each end until snug, then tighten. This will seat the fuel line. Reassemble remaining items in reverse order of disassembly steps. When done, the fuel injector numbers you wrote down earlier will have to be entered into the DME. If you do not have a BMW scan tool that is capable of this, you can drive the vehicle to a workshop that can program it for you. There may be a slight decrease in drivability until it is programmed, so do not drive it any further than you have to.

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Comments and Suggestions:
Peter1986 Comments: What should be the pressure on the terminal injection/fuel rail Schrader valve ?
E90 320i N46 2005y
September 26, 2016
  Followup from the Pelican Staff: We don't have the engine in the US, I don;t have the info to share. - Nick at Pelican Parts  
Arv Comments: Hi there. Thanks for the detailed explanations as always.

I have an E90 N43 engine. My engine's been misfiring lately and when I checked my smooth running values, I get the below. Do you reckon this is something to do with the fuel injectors? Any other advice is highly appreciated? Thanks.
Smooth-running value, cyl 1 = 93.000
Smooth-running value, cyl 2 = -69.900
Smooth-running value, cyl 3 = -34.100
Smooth-running value, cyl 4 = 7.100
Value of 1.0 engine order = 6.2
Value of 0.5 engine order = 0.7

Thank you.
September 4, 2016
  Followup from the Pelican Staff: Could be any part of the mixture causing a misfire. I would check spark, fuel and compression on all cylinders. Stick to the basics for misfires.- Nick at Pelican Parts  
khoo Comments: Why can you not reuse the "steel Fuel Line"? I see many people do.
August 31, 2016
  Followup from the Pelican Staff: The end of the line is designed to form the the injector and seal. It can only form once, then needs to be replaced. - Nick at Pelican Parts  
Ahmed Kassem Comments: Hi,I habe bmw 320i and Im facing a problem.when the car is cold,when i press petrol to accelerate,the response is veeeeery slow then suddenly the car runs normally,sometimes it shakes a little bit also.

I checked live data on with the cpu,and the value of the injectors were different
Cyl 1....0.5
Cyl 2....-0.5
Cyl 3 ....-0.5
Cyl 4......2

The values are not accuarate as i cant remember them exactly..but its something like this,is that normal? Or one of them is faulty?

There were no faults also ehen we checked with cpu
August 13, 2016
  Followup from the Pelican Staff: Could be an issue with the fuel pump. I would perform a fuel delivery system test. Check fuel pressure, volume and quality.
- Nick at Pelican Parts
 
Zedolph Comments: Hi Nick, Two question, 1 if a cylinder fails a compression test, what next? 2 Do the non turbo engine injectors need coding too? thanks
July 20, 2016
  Followup from the Pelican Staff: Leak down test to determine where the compression loss is. Then repair the component losing compression, ie: valve, rings, head gasket.
Non-turbo engine injectors do not require coding. - Nick at Pelican Parts
 
Craig9999 Comments: Hi just a quick enquiry, I've bought what was sold as a new injector on eBay, but opening the box, it smells like petrol gas and the metal cap come off really easily by hand. Have I been conned?
April 27, 2016
  Followup from the Pelican Staff: Most likely a used injector. They don't have fuel in them when new. - Nick at Pelican Parts  
Richy_335d Comments: Hi, Thanks for this DIY, my 2008 335d engine cut out on me last week, fault showed up on reader as injector no 5. Replaced this today but now it won't start, various unknown faults have been logged on iCarly but the glow plug symbol shows up on the dash when it's turning over and the engine light is on. Any ideas please? Thanks
April 25, 2016
  Followup from the Pelican Staff: I can't help without knowing what is missing from the system when you are trying to start it. When your engine doesn’t start you’ll want to check the basics. Check spark, fuel injector pulse and fuel pressure, volume, quality and engine compression. What are the fault codes? Once you figure out what is missing, it will be easier to diagnose.
- Nick at Pelican Parts
 
Joe C from HSV Comments: No codes have occurred. Plug are 15K old. Have new coils and will replace those. Not sure about fuel injectors and the car has 105K miles.
April 1, 2016
  Followup from the Pelican Staff: if the service engine soon light is ON, there are faults stored. I would check the items I mentioned earlier to pinpoint the misfire. - Nick at Pelican Parts  
Joe C from HSV Comments: One more clue to the puzzle. I have new ESS done by a pro ~ 1 month ago for $1000!..still has problem described in previous post.
March 30, 2016
  Followup from the Pelican Staff: Got it, thanks. - Nick at Pelican Parts  
Joe C from HSV Comments: My 2009 328i has what feels like an occasional misfire at idle. Not sure if it is misfire with more throttle. looked at plugs and one #4 was discolored at the coil end not nice chrome like others, but dark. Threads appeared blacker, but not oil like. Never had a code. Once on hard excel, ran rough and showed "service soon". Pulled over and performed restart. All was well and has only happen one other time which cleared when I pulled my foot out of the throttle. Have a fresh set of coils in hand but not installed. Help?
March 30, 2016
  Followup from the Pelican Staff: Do you have fault codes for a misfire?

I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts
 
Jan Comments: Hi. My 318d N47 E90 has a problem with rough idle after start. I have changed three glow plugs could not pulled out the one on 2nd cylinderand the glow plugs relay and it didn´t help. Then I´ve checked the fuel injectors with diagnostics and they are all good. I´ve also done the compression test and it was OK. Don´t know what to do know. Fuel is ok, fuel filter is ok, oil filter and the oil was changed a month ago mobil 0w40 but the car still idles very rough after starting and few second later 5-10 everything is smooth and fine. Could the problem be the different oil? or the one glow plug which I couldn't change?
March 30, 2016
  Followup from the Pelican Staff: if compression is good, it has to be the injectors., Try to isolate the cylinder causing the rough idle, then replace the injector. - Nick at Pelican Parts  
Yangorang Comments: What kind of coding, if any, is required when installing a new fuel injector on an N52 engine? Is this something that can be done from INPA or Bavarian Technic?
March 28, 2016
  Followup from the Pelican Staff: N52, no coding needed. - Nick at Pelican Parts  
Yangorang Comments: Was there a recall or update on fuel injectors for the N52 engines or was that only applicable to the turbo engines?
Trying to figure out if its worth going after these to troubleshoot a slightly rough idle after I already replaced spark plugs, ignition coils, and VANOS solenoids.

Also what do you guys think of remanufactured / cleaned injectors?
March 28, 2016
  Followup from the Pelican Staff: I don't know, you will have to check with BMW for recalls.

Remanufactured injectors are usually just cleaned and flow checked. So they are not rebuilt. Don't respect them to last longer than a new set would. They are a good option though for saving money. - Nick at Pelican Parts
 
Wallace Comments: 318i petrol engine excessive cranking .dealer replaced 1injector and coil 3weeks later problem has recurred
March 26, 2016
  Followup from the Pelican Staff: When your engine doesn’t start you’ll want to check the basics. Check spark, fuel injector pulse and fuel pressure, volume, quality and engine compression. Are there any fault codes? Once you figure out what is missing, it will be easier to diagnose. - Nick at Pelican Parts  
Bryte Comments: I have a convertible 2007 e90. I have an engine light on and
- when idling it shakes rough.
- The power on the car is reduced.
- on diagnostic it shows lots of problems including cylinder 3 and fuel pressure pump. I was given a quotation well over £4000 to fix it.
I am not a mechanical person but I do think I am being ripped off surely.
Nick would you be able to help with some advice coz I don't have that much to fix the car
March 15, 2016
  Followup from the Pelican Staff: I would suggest having the shop explain the fault and required items, or get a second opinion. Hard for to guess. BUT - Sounds like an engine misfire. If it were me, I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Matt330i Comments: My e90 330i runs rough on cold start up and unless I drive off immediately it develops a misfire cyl 3. I have replaced all plugs, coils and cyl 3 injector and still same issue. I've got compression of 155 and smoke test shows no air leaks. Please please help
March 14, 2016
  Followup from the Pelican Staff: Sounds like you have everything for the cylinder to run well. So that means one of the tests missed the issue. Try checking spark, fuel and compression on all cylinders when the problem is present. I bet you find something different on cyl 3. - Nick at Pelican Parts  
Jay Comments: Hi I have a quick question I recently had a donor motor put into my 2011 bmw 328i and I've noticed while it runs it has a odor emitting from it. It smells like fuel. The place that put the motor in used a lot of my older components si my question is do you think the smell could be the fuel injectors? I did have a gasket leak oil and had to replace that and I wonder if the smell could also be oil. Also the car has a weird idle. While I'm sitting at a stop light with no a/c on its like it drops to 500 rpm and has a rough idle in a way to where you can feel it through the car. It's not like so rough where the car is shaking hard but you still notice it through the car.
January 26, 2016
  Followup from the Pelican Staff: It could be a fuel leak or an exhaust leak. Both of which are unsafe, so do not drive the vehicle until you locate the source. Look for fuel leaks with the system on, with the engine off. Check for exhaust leaks using a smoke machine. - Nick at Pelican Parts  
George Comments: Any adaptations that should be reset after changing injectors? 2006 330Xi N52
January 12, 2016
  Followup from the Pelican Staff: No. - Nick at Pelican Parts  
Ccad Comments: Hi, I have a 2010 335xi automatic; I am having cold morning start problems when the engine is first started in the morning. The engine runs rough at low idle when engine is under load in braking when in drive for the first few stop signs then runs fine all day with no issues. It is like misfiring and trying to stall. No codes or warning lights. Seams to be worse when sits out at night in below freezing temps I am wondering if it is a leaky injector condition plan is to replicate problem pull plugs to try and identify wet fowled one and therefore the location of the problem injector.
December 17, 2015
  Followup from the Pelican Staff: Probably a fuel delivery issue. Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts  
Mazz Comments: I have an e90 2008 320i. Last month I got stuck as the road had a dip with lots of water. Not being able to reverse I had to go through it. The car was running fine however a light comes up saying fuel engine power no longer available randomly and the car judders on 3rd gear under hard acceleration. Is it related to the fix you posted? Sorry if it's nott
November 20, 2015
  Followup from the Pelican Staff: Your issue is likely sue to water intrusion. I would check the DME for fault codes. A code will be stored pointing you to the problem area. - Nick at Pelican Parts  
h20pt Comments: Hi there,

First of all, thank you for this amazing DIY.

I've read my car with INPA and it came up with 5 IM errors that i can't delete:

41ED cyclic authentication
4185 exhaust temperature sensor vor Kat, signal
4CE0 system of partical filter
4B90 rail pressure monitoring at engine-start
4B10 rough controller

The car symptoms are as follows:

- Sometimes, it takes a while to turn engine on about 1/2 seconds more than normal, but it never misfired or failed to start;
- It started to produce black smoke at high acceleration, not much, but enough to "paint" the exhaust pipes with black - meaning bad combustion too much fuel or too little air intake - the air filter just got switched, so it can't be from that;

I've checked mass adjustment with INPA and concluded that, in normal and high acceleration, the 4 injectors compensation are within the middle one injector, number 3, is a little bit distant from the others - about 1.3/1.4 mg/stroke - but still inside the "green zone".
When idle, the injector in cilinder 3, goes up to 2.85/2.90 mg/stroke almost to the red zone. The car won't struggle or become rough at working at anytime, but that's what happens when i check mass adjustment.

Can you please provide any thoughts about what could be causing the black smoke and all the other errors?

Thank you so much.
November 19, 2015
  Followup from the Pelican Staff: You may have a faulty injector. The codes don't show up for me as a US model. So I can't be much more help. - Nick at Pelican Parts  
Netty Comments: In addition to what I have just posting it is over fueling from cold on this cylinder.
November 16, 2015
  Followup from the Pelican Staff: OK, got it. - Nick at Pelican Parts  
Netty Comments: I have a E90 BMW. I have recently had an injector replaced and coil pack along with spark plugs. I am still getting a fault code on the injector that was replaced and when cold it is juddering and the engine management light is on again. Please help.
November 16, 2015
  Followup from the Pelican Staff: I would check if the wiring is faulty or if the DME is trying to fire the injector. You may have a faulty DME or wiring. - Nick at Pelican Parts  
jake Comments: i am still having an issue with rough running but did figure out why my injectors didn't seat. i purchased another rail w/ injectors since it was more for testing - used from fleabay - for my 328xi and carefully examined how the injectors were seated into the rail. It turns out that there are 2 notches where the clip can attach to on the top of these injectors.

Please be careful and secure the clip to the top notch... the one that won't insert the injector deep into the rail tubes. I assumed that the injector should go deep into the tubes which extend out of the rail but it turns out that the orings only go in probably 1/3rd the way in.

I've now have gone through this process 4 times very carefully trying everything to get my engine running right. I was 99% sure that identifying and fixing this seat\notch problem would resolve my P0210 regular obd code and rough running engine but it has not.

I am going to next check fuel pressure since I've swaped out the plugs and coils already w/o effect. Running out of options before I take her into the dealer to get ripped off. Any suggestions on what I might try? Thanks.
October 12, 2015
  Followup from the Pelican Staff: Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts  
Jackie Comments: BMW 335I E90 the car is jacking and the engine light comes on but they change the fuel injectors as well as the turbo but it is still jacking and keeping out white smoke at the exhaust .what can be problem?
September 11, 2015
  Followup from the Pelican Staff: Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
jake Comments: thx for prompt reply. so one thing a friend told me is that i may have to reset adaptation or something to that effect for as many parts as i replaced on my car... 3 coils, 3 plugs all for bank 1 and all 6 injectors and rail. i thought that for my 328xi wagon that everything was plug and play and that i wouldn't need a bmw cable or the bt tool? is he right?

i don't have any software to do this so would have to take it to an indy shop if this is required. thanks.
September 9, 2015
  Followup from the Pelican Staff: Normally aspirated cars will not require a fuel injector adaptation. Address why the injectors won't seat, you will find the cause of the problems. - Nick at Pelican Parts  
jake Comments: nick... this is a great write up. i have the non turbo e91. so i followed everything in your instructions but ran into an issue. when i tried putting in a new fuel rail with new injectors, the distance between the bottom of the tabs - where the screw hole is - made the injectors appear to not go in far enough to feel tightly seated.

so what i did was to take each injector and hand push them in individually but then realized that the tab length made the top clips not fit. i then slightly bent the sides to close the distance between the top and bottom and was able to put the top clips back on. my car is now running really rough. i measured the dimensions between the new and old rail and they are identical.

what am i doing wrong? if i assemble the rail + the injectors and push down on it, i can see that it's clearly not going far down enough to feel properly seated. just can't figure out what's going on. advanced thanks for you help.
September 8, 2015
  Followup from the Pelican Staff: There may be O-rings stuck in the engine from when you removed the old injectors. That would make sense for the fitment issue and the rough running. - Nick at Pelican Parts  
gattuso Comments: my e90 misfires and during diagnosis it says misfire cylinder 3,what could be the problem
September 2, 2015
  Followup from the Pelican Staff: A part of the combustion process is faulty.
I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts
 
jake Comments: nick...one thing i was hoping that you can clarify. the DME encoding procedure is not required on non turbos correct? I have a 2007 328xi.
August 29, 2015
  Followup from the Pelican Staff: Correct, only engines with direct injections. - Nick at Pelican Parts  
Daniels13 Comments: I fixed,was the coil from cylinder.
Thank you! Have a nice day!
August 3, 2015
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
Daniels13 Comments: Hello,
My e90 325i have a problem with check engine light and shake when i stay on the red...i put the diagnostic and i had 2 errors:
- missfire cylinder 5
- low fuel on the tank
What you advice me ?
August 2, 2015
  Followup from the Pelican Staff: Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Tuc Comments: I have a 320i bmw e93 and got misfire and scanner says code 29cf
Combustion misfire 3 I've put new plugs in it and moved the coils packs from 3 to 4 and 4 to 3 and it still the same I've also done the same with the injectors and that's still the same any one no wot it can be also the car only done 42700 mile
July 30, 2015
  Followup from the Pelican Staff: I would check spark, fuel and compression on all cylinders. Doing so will find what is causing the misfire. - Nick at Pelican Parts  
Mike Comments: What is the technical benefit of purchasing decoupler elements? Can't I just bend the ones on my old injectors back into shape if they are bent?
July 14, 2015
  Followup from the Pelican Staff: The decoupling elements can be used only once and have to be replaced each time they are removed. They insulate, help to seal and make up for manufacture tolerance in injectors.

Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
BMWCHAP Comments: Hi Nick, 2 questions:

How can I determine if my car suffers from Carbon fouling, high pressure fuel pump or bad injectors?

Had at BMW recently and was told #1 injector was bad and has an index of 2! to replace but based on what I’m reading “injectors with index 10 and lower have a different calibration and construction than injectors with index 11 and higher. Due to this difference, the injectors with index 10 and lower and injectors with index 11 and higher cannot be mixed in the same engine bank´ So, if this is true, should I assume that all of them need replacement??

Great Tech write up by the way! Cheers, 07 335i
May 5, 2015
  Followup from the Pelican Staff: I have heard this, below 10 and above 11 not mixing. To test the high pressure pump, you need to check in tank volume and pressure. Then test high pressure pump pressure at start up and running using a BMW scan tool. - Nick at Pelican Parts  
Stresspuppy Comments: Is there any difference in procedure for the 335d twin turbo from what is described here for the turbo? Are there different parts needed?
April 20, 2015
  Followup from the Pelican Staff: The engines are quite different.

Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
fwtd Comments: Hi, do you have a guide for an E90 330i lci? Im assuming the principals are the same but my fuel system looks very different. Thanks
April 16, 2015
  Followup from the Pelican Staff: On US models it would be the same for 330 models. Not sure about non-US models. - Nick at Pelican Parts  
White dog Comments: 335i-Replaced all fuel injectors, car runs fantastic. Do I still need to scan injector #s into ECM? numbers are not the same as on the old ones


BY the way,you are by far the best site on net for this stuff
March 14, 2015
  Followup from the Pelican Staff: Yes, you will need to enter the new injector numbers. This is the only way for fuel control to be spot on.

Thanks for the compliment. - Nick at Pelican Parts
 
White dog Comments: Why the need to replace fuel lines when you replace injectors if you have no leaks
March 14, 2015
  Followup from the Pelican Staff: The flared ball end compresses to complete the seal when tightened. They are designed to be single use. - Nick at Pelican Parts  
Elilor Comments: Will I still be able to drive with the new injector without reprograming it?
August 23, 2014
  Followup from the Pelican Staff: The engine will run - yes, the engine may run poorly until you code the injector to the DME. - Nick at Pelican Parts  
Beefeater Comments: Can you recommend a BMW scan tool with URL link?
July 18, 2014
  Followup from the Pelican Staff: This is my preferred tool:

http://autologic.us /en/pages/homeproducts/autologic-solution/bmw-diagnostics - Nick at Pelican Parts
 
Beefeater Comments: How could I code the new injector into the DME?
July 16, 2014
  Followup from the Pelican Staff: Using a BMW scan tool. - Nick at Pelican Parts  
Beefeater Comments: Follow up from Beefeater.
I have replaced one injector and the car no longer drinks petrol and there is no misfire. I found that the steel fuel line had rounded nipples that sit into conical recesses. The main dealer does not discard the lines and my unions are not leaking. I did need a new decoupling ring. Once the Teflon coated protective metal sleeve is removed, the injector needs to be inserted within 20 minutes otherwise the end expands and cannot then be inserted. I used silicone spray to help ease it in. It is a push fit. The O ring came pre-fitted to the shaft of the injector. It does not look like an O ring. It looks more like a black band round the shaft and is exposed when you pull off the Teflon coated protective sleeve.
July 16, 2014
  Followup from the Pelican Staff: The lines are recommended to be replaced by BMW each time they are removed. Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
Beefeater Comments: Hi Nick
Location: England. My car: 2007 E93 325i convertible JV92944.
My BMW garage estimate for changing the injectors does not include the high pressure pipes £140 value here. It does however include the decoupling elements pt no. 7564751 that you do not seem to refer to. Do I need the pipes but not the decoupling elements? Many thanks for providing your great website.
July 15, 2014
  Followup from the Pelican Staff: Some models do not have decouplers. If you have them, you will need both. The pipes are single use, as noted by BMW. - Nick at Pelican Parts  
DaveBMW Comments: I'm crying here. Sold my 540i and purchased a 07 335i. After 10 days the #3 fuel injector failed. Replaced the injector and line had to take to standard mechanic as it was Saturday and I was out of town. Only about $800. She was running like a kitten again. But, today the following day and about 150 miles later, it is doing the same thing. Tomorrow taking to an actual BMW mechanic. I am not sure if the injectors were replaced, hopefully find out tomorrow. She has been in for regular maintenance since original purchase. I was reassured by this, but now...
June 29, 2014
  Followup from the Pelican Staff: Please keep us posted. Would like to know what they find. - Nick at Pelican Parts  
jack Comments: I only need the O-rings where can I get them?
February 25, 2014
  Followup from the Pelican Staff: Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
Bimmerboy335 Comments: Hi,
On my 335 2007 e93 the injectors make a noise on tick over, it's a common problem with these models, do you think it would help if I fitted a new set of injectors?or is there any thing else I can do to stop the ticking noise on idle?
January 16, 2014
  Followup from the Pelican Staff:
ticking from your injectors is normal. - Nick at Pelican Parts
 
Haidar Comments: Hi there, thanks for sharing the instructions. this has been incredibly helpful.

I have a 2008 E92 320i. I replaced my ignition coils as part of the recall 3 months ago and replaced my spark plugs immediately afterwards.As soon as the London cold weather kicked in I started having random once every week or 2 engine misfires on cylinder 3 on cold starts only: Error code: 29C. I tried swapping the coils and spark plugs but the error remained the same in cylinder 3 and soon afterwards the problem exacerbated resulting in rough idling. I thought it must be the fuel injector on cyl 3 so I ordered a new one from BMW and carried out the replacement myself as per the video and I've also performed injector coding on INPA.

The rough idling problem is no longer there following the replacement but I am still getting random engine misfire on the same cylinder errors 29CF. Im getting frustrated with this as I tried everything, is there anything else I should look at?

Many thanks! 
January 15, 2014
  Followup from the Pelican Staff: I would check compression on the cylinder. That is if you are sure spark and fuel are OK. - Nick at Pelican Parts  
David Comments: On figure 11 you talk about not being able to re-use the fuel line. Why is that and do you sell that part and the o rings.
December 22, 2013
  Followup from the Pelican Staff: It is a steel line with ends that crush, no O-rings. Yes we sell it, Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
Mark Comments: If same model number I am fine? Thanks
September 25, 2013
  Followup from the Pelican Staff: No, not model or part number. The fuel injector calibration number has to be the same. The six white numbers on the side. - Nick at Pelican Parts  
Mark Comments: question, if I change to same type of fuel injector do I still need to reprogram DME?
September 24, 2013
  Followup from the Pelican Staff: If your injector has the same number, the answer is no. I have yet to receive one that was the same. - Nick at Pelican Parts  

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