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Understanding the E46 Engine Management Systems
 
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Pelican Technical Article:

Understanding the E46 Engine Management Systems

Nick Czerula

Time:

1 hour1 hr

Tab:

$200

Talent:

**

Tools:

ECM flash tool, supplied with software

Applicable Models:

BMW E46 3-Series (1999-06)

Hot Tip:

DME stands for Digital Motor Electronics

Performance Gain:

Fuel economy and performance

Complementary Modification:

Flash DME software for a performance upgrade

E46 Engine Management Systems - An Overview

BMW E46 vehicles (1999-2005 3-Series) are equipped with digital engine management systems (called Digital Motor Electronics or DME) developed by Siemens. The engine control module (ECM) in these systems is programmed with software for the control of fuel injection, ignition and other functions. Siemens DME systems comply with second generation on-board diagnostics (OBD II) standards.

The list below summarizes the DME systems used in E46 vehicles:

Year, Engine                             Siemens DME

1999 - 2000 M52 TU                 MS 42.0

2001 - 2005 M54                      MS 43.0

2001 - 2005 M56                      MS 45.1

Fuel Supply - Fuel Injection

An electrically operated fuel pump, located inside the fuel tank, supplies high pressure fuel (approx. 3.5 bar or 50 psi) to the engine fuel rail. The fuel rail in turn distributes fuel to the electronically-actuated fuel injectors.

The ECM meters the fuel output of injectors using pulse width signals. It varies the pulse width based on input signals. Inputs to the ECM include:

  • Air intake volume using mass airflow sensor signal.
  • Ambient and coolant temperature signals.
  • Accelerator pedal signal.
  • Crankshaft and camshaft position signals.
  • Knock sensor signals.

Engine Control Module (ECM):
The engine control module (ECM), mounted in the electronics-box (E-box) (green arrow) to left of the brake master cylinder in the left rear engine compartment, is flash-programmable.
Figure 1

The engine control module (ECM), mounted in the electronics-box (E-box) (green arrow) to left of the brake master cylinder in the left rear engine compartment, is flash-programmable. Five electric harnesses connect the 134-pin ECM to the engine, body and other components.


The ECM can be reflashed (reprogrammed) to boost certain performance parameters, such as allowing for higher top RPMs or increasing low-end torque. Two of these modifications are described in additional detail later.

Intake System: 
The molded plastic intake manifold (green arrow) consists of two sets of three intake runners.
Figure 2

The molded plastic intake manifold (green arrow) consists of two sets of three intake runners. Resonance valves are used to vary the length of the runners in order to enhance low end torque at low engine speeds or allow high volume air flow at medium or high engine speeds.


The intake manifold is also equipped with a 5.5 mm turbulence port for each cylinder. These ports channel idle and low speed air from the idle speed control regulator to the intake valve in each cylinder. (There are 2 intake valves per cylinder.) Air rushing through one valve causes air swirl and more efficient fuel atomization in the cylinder.

Variable Camshaft Timing (VANOS): 
E46 engines are equipped with a double-VANOS system (green arrow).
Figure 3

E46 engines are equipped with a double-VANOS system (green arrow). The engine control module (ECM) is able to control both intake and exhaust valve timing by actuating solenoids that direct engine oil pressure to the VANOS system. The VANOS actuators are fully variable; the intake and exhaust sides operate independently.

Variable camshaft timing (VANOS) offers the following advantages:
  • Increased power
  • Higher low end and medium speed torque
  • Improved idle and fuel efficiency
  • Elimination of external EGR plumbing (internal EGR)
  • Quicker warm-up and lower emissions

Throttle Control- Idle Control: 
The throttle is electronically-actuated based on accelerator pedal input.
Figure 4

The throttle is electronically-actuated based on accelerator pedal input. In MS 42.0 vehicles (1999 - 2000), an accelerator cable connects the gas pedal to the electronic throttle valve. In MS 43.0 and MS 45.1 vehicles (2001 - 2005), the throttle cable is eliminated and throttle actuation is completely electronic (drive-by-wire).

The idle speed control valve, located under the intake manifold, is controlled by the ECM to bypass varying amounts of air around the closed throttle valve.
Figure 5

The idle speed control valve, located under the intake manifold, is controlled by the ECM to bypass varying amounts of air around the closed throttle valve. Idle speed is not adjustable.

Ignition and Knock Control: 
The ignition system uses one ignition coil per cylinder, each coil mounted above a spark plug.
Figure 6

The ignition system uses one ignition coil per cylinder, each coil mounted above a spark plug. Multiple sparks per ignition cycle are used to reduce emissions and extend spark plug life. Spark timing is controlled by the ECM using an ignition spark "map." Spark timing is not adjustable.

However, to prevent engine damage in case of adverse conditions or poor fuel quality, knock (detonation) sensors (green arrows) are mounted on the engine crankcase.
Figure 7

However, to prevent engine damage in case of adverse conditions or poor fuel quality, knock (detonation) sensors (green arrows) are mounted on the engine crankcase. These are microphones tuned to the frequency of engine knock and communicate such knock to the ECM. The ECM can respond to these signals by changing (usually retarding) the ignition timing at one or more cylinders.

The three front cylinders (Bank 1) and three rear cylinders (Bank 2) are each equipped with a separate exhaust manifold each with an integrated catalytic converter. This allows the converters to heat up a very short time after a cold start. The manifolds are also equipped with four oxygen sensors, one before each catalyst and one after. Oxygen sensor signals are used by the ECM to control fuel delivery.

Reflashing the ECM :
There is a well-tested system for reflashing (reprogramming) the ECM, depending on your vehicle year and model:
Figure 8

There is a well-tested system for reflashing (reprogramming) the ECM, depending on your vehicle year and model: The Shark Injector, designed for 1999 - 2000 models, reflashes the ECM to improve low-end torque. The car wonâÂt hesitate or lag, making it easier to drive. And with the extra torque you can drive in a higher gear and not have to downshift as often, thus improving fuel mileage. The Shark Injector may be upgraded via USB port, depending on your performance needs.

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Comments and Suggestions:
sparklin1 Comments: Hi. I have a 2001 325i I bought at auction. I have an OBDII Scan tool to check my emissions before I got to get the vehicle smogged. There are no fault codes, only one incomplete test - the secondary air system. I have done numerous cold starts yet still incomplete. I viewed the live data and it states that the secondary air system is off. I don't know what to do at this point and it is the only thing keeping me from passing smog, hence getting my plates and tags which I already paid for. Any suggestions??
November 23, 2016
  Followup from the Pelican Staff: Does the pump for secondary air run when the engine is started cold? if not, you will have to find out why. If it runs, you will h ave to see if the air is making it into the exhaust stream. - Nick at Pelican Parts  
aston Comments: nope still no luck... im taking the car back to the garage and asking for my money back or fix the car for free, could a different cone air filter bring the code up p1500??
November 22, 2016
  Followup from the Pelican Staff: A cone filter or performance intake system can cause fault codes. - Nick at Pelican Parts  
aston Comments: hi.. i have checked all the connections and they seem all ok, i have now brought an icv rubber grommet. i will fit that to see if that could be the problem. fingers crossed
November 21, 2016
  Followup from the Pelican Staff: Seem ok or tested them to confirm the circuits are good? - Nick at Pelican Parts  
aston Comments: it hase a new maf on it, but it was only 50 pounds off ebay, could it be that that keeps bringing up the code p1500??
November 18, 2016
  Followup from the Pelican Staff: No, you would likely have a maf sensor fault if it were faulty. - Nick at Pelican Parts  
aston Comments: hi.. so an up date.
there was a lot of stored codes on the eml. so i got them all cleared and took the car for a drive and then the eml came back on with p1500 and p1118.. still no clue
November 17, 2016
  Followup from the Pelican Staff: See my earlier response.- Nick at Pelican Parts  
aston Comments: hi... the code is p1500 icv stuck open. the car starts fine and runs fine no issues with idle... i can drive the car 2 miles when the car is running at operating temp and the code comes up. it only comes on when the car is up to temp??? im lost with it, i have a bmw mate who is going to pug it in and test all censors are giving the correct signal, as i only have a cheap ebay obd 2 diagnostic tool... i will let you know of the out come
November 17, 2016
  Followup from the Pelican Staff: if the idle seems normal, check for a wiring issue to the valve or a faulty valve. - Nick at Pelican Parts  
aston Comments: and all so checked the disa rubber seal and cleaned, and the pcv is ok, there are no air leaks at all
November 15, 2016
  Followup from the Pelican Staff: What is the issue with the engine? What are the symptoms? - Nick at Pelican Parts  
aston Comments: i have a 325ti and i put a cone air filter on it and now i have the code po1500, i changed the icv and maf, and checked all the rubber intake boots. and it still comes up. so i put all the stock air box and filter back on, and the code po1500 still comes back
November 15, 2016
  Followup from the Pelican Staff: Is the P0150 or P1500? You have too many digits there. - Nick at Pelican Parts  
Tilt Comments: Should I take the ICV off and clean it, it has 173587 miles on it...
November 14, 2016
  Followup from the Pelican Staff: That will not fix a rough running issue. - Nick at Pelican Parts  
Tilt Comments: I have a '03 325i that starts and runs when its in the 1200-6000 rpm range, but idles real rought and then dies. shut off, start, repeat......
November 14, 2016
  Followup from the Pelican Staff: Is the check engine light on or flashing when the problem is present? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
11julitos53 Comments: Yes I have another question, will I be able to access any faulty codes even if I am not getting any power to the instrument cluster. I am not getting any power to the windshield wipers headlights radio. My car is a 2000 bmw 323i
November 13, 2016
  Followup from the Pelican Staff: Not from the components that are off, but other components should display data and fault codes. - Nick at Pelican Parts  
aston Comments: i have the code po1500 idle control valve stuck open, so i brought a bran new bosch icv and its still coming up with stuck open. what could it be
November 4, 2016
  Followup from the Pelican Staff: What other symptoms are there? What vehicle are you working on? - Nick at Pelican Parts  
julitos Comments: I have a 2000BMW 323i. my problem is that there is no power going to the instrument cluster, also meaning I cannot start the car. what could have caused this to happen but mostly how can I fix this?
October 29, 2016
  Followup from the Pelican Staff: Could be a faulty ignition switch. I would start by checking the vehicle for fault codes. If multiple systems are not working properly, fault codes will be set. This will be your best bet when diagnosing.
- Nick at Pelican Parts
 
YKL Comments: I have a 2005 BMW 325i. Alternator went bad and later found that fuel pump was also faulty. Engine ran for a while and shut down. Used an external pump and engine ran like normal but noticed that the engine computer started getting really hot. What could be the reason for this?
October 20, 2016
  Followup from the Pelican Staff: What was the temperature of the DME? You may have felt the normal temp it runs at. Did you confirm the new alternator was working correctly? - Nick at Pelican Parts  
PLANT Comments: An open sensor circuit means I need to change the sensor?
October 8, 2016
  Followup from the Pelican Staff: No necessarily, could be the wiring as well. - Nick at Pelican Parts  
PLANT Comments: Engine does not run hot
October 8, 2016
  Followup from the Pelican Staff: Then the sensor circuit is likely open. - Nick at Pelican Parts  
PLANT Comments: I have a 2000 BMW 323 and replaced the engine. The temp gauge is all the way to the right instantly. Check for pinch wires from the sensor and found nothing. Car does not overheat any suggestions?
October 3, 2016
  Followup from the Pelican Staff: Is the engine actually running hot? - Nick at Pelican Parts  
MontanaMike Comments: Hi Nick,

On 04 330XI with faulty computers... all the lights on the dash for ABS and EML and Service Engine are lit up. According to my manual, the car will start and idle when the computers fail, but will not go as you give it throttle. However, I will check my alternator - thanks
August 5, 2016
  Followup from the Pelican Staff: Let us know what you find. - Nick at Pelican Parts  
MontanaMike Comments: Have 04 330xi. ran great but has been sitting a lot. Ran it for 40 miles after filling with gas and then both the brake abs computer and the ECM apparently failed, at the same time. Now car idles fine but will not travel. What could take out both computers at the same time?
August 4, 2016
  Followup from the Pelican Staff: Are you sure they are faulty? How did you determine this? It could be simple charging system issue. - Nick at Pelican Parts  
Lee117 Comments: Can someone tell me if there's a fuse for the egr pressure convertor on a e46 320 cd
July 11, 2016
  Followup from the Pelican Staff: Not sure, we don't have that engine here in the US. I opened a post in our forums. A Pelican community member may be able to answer your question.
- Nick at Pelican Parts
 
Dullah Comments: BMW x5 3.0 petrol the fault code comes 12 exsosty camshaft sensor replace but still there. Wiring harness from sensor to ecm are ok. And change the ecm but still the same code. And if start the car no good idle but if l remove the socket from the air mass it be have good and air mass have read change but still the same. Pls help what could be the problem for this car
May 16, 2016
  Followup from the Pelican Staff: What is the P-code that is stored? It's possible the harness is shorted, and the signal is not getting to the DME. - Nick at Pelican Parts  
Dullah Comments: Hi have bmw x5 3.0 petrol replace the exsosty camshaft sensor still diagnosis say camshaft sensor exsosty.. And another if l remove the socket from the air mass the ingine paform good but if put it back it has not been able to have power. Need help please
May 16, 2016
  Followup from the Pelican Staff: What is the P-code that is stored? It's possible the harness is shorted, and the signal is not getting to the DME. - Nick at Pelican Parts  
Clem Comments: I own a 2004 BMW 325ci. The speedometer & odometer do not function. All other dashboard functions are OK. Is the problem related to the auto trans speed sensor? Where is part located on the car.
May 11, 2016
  Followup from the Pelican Staff: it could be. Best bet is to check if the DME has a speed signal. If so, the sensor is not at fault. Then it may be the cluster or the bus system. - Nick at Pelican Parts  
sbryan Comments: Besides sparkplug, ignition coil, and wiring harness what are some possible causes for a single cylinder to not receive spark? This is on a 2003 325i. The engine runs, but rough of course because one cylinder isn't firing. Are there any sensors that would affect a single cylinder?
April 26, 2016
  Followup from the Pelican Staff: Power, ground, or the trigger to the coil is missing. - Nick at Pelican Parts  
Jimmy Comments: Just bought a 2003 325 Coupe with m54 motor. I think the DISA is not working how it should. If I start the engine the valve is closed, then when I start bringing the revs up the valve doesn't react at any RPM. When the revs go down to about idle, the valve opens and closes within a second. I checked the DISA and the vacuum seemed OK. What should i do? Thanks, Jimmy
April 25, 2016
  Followup from the Pelican Staff: See this article for inspecting it:

http://www.pelicanparts.com/techarticles/BMW-E60/26-FUEL-M54_6_Cylinder_DISA_Valve_Replacement/26-FUEL-M54_6_Cylinder_DISA_Valve_Replacement.htm - Nick at Pelican Parts
 
hueyy Comments: 2001 bmw 330i m54 motor Crank/no start with pedal down it almost/starts some little backfire. Checked every thing in trouble shooting guide. Has Spark from plug but not fast,50psi fuel at rail moves a little when cranking but will lose psi win turned of, can hear tapping at all injectors injectors with stethoscope, have new filer/regulator on the way guy I got it from said it would start with staring fluid . NEW cam sensor and plugs 1. how fast/often should a plug spark while cranking?? PLEASE Help any other thoughts??
April 11, 2016
  Followup from the Pelican Staff: You have to confirm the fuel injectors are firing, sound is not a good option. MOnitor the electrical signal.

If they are, check compression, as it may be a mechanical engine issue. - Nick at Pelican Parts
 
Cordt Comments: I have an issue with my E46 325i with the M54 engine. I have changed the following:
Spark plugs
MAF
fuel filter
Air filter
Checked DISA it is not loose
Replaced broken lower intake boot and rechecked for vac leaks, could not find any
Had the intake cleaned

Anyway my issue is as follows - when the car is totally cold it drives amazing. Just like a brand new car. However when the car warms up and especially when it is warm outside the car loses quite a bit of torque and I get a bucking/pulsing feeling upon acceleration between 2-3500RPM that is not dependent on speed, manual trans and if acceleration is very light I will not feel it however at about half throttle or more it will do this almost every time. I even had it at a bmw dealership and they could not tell me what my issue is. He suggested spark plug coils but why would that not throw a code of the symptoms are bad enough to notice like this? And why would it not do it when the engine is cold?
March 17, 2016
  Followup from the Pelican Staff: Heat can cause electrical components to fail. Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Hark Comments: 2005 BMW 325ci convertible auto trans when attempting to drive the car it has no power does not shift properly then eml, traction control, and brake light illuminate and car goes into limp mode, accelerator will not respond tach bounces between 1 and 3 rpm can shut off ignition and immediately restart the car and all lights are off and car runs normal until attempting to drive scanned for codes read p411 evap purge control valve stuck open, p420 and p430 catalytic system below threshold bank 1 and 2 and p16a7 consult service manual could the purge valve being stuck open cause these problems? Any ideas or suggestions would be greatly appreciated. Thanks.
February 26, 2016
  Followup from the Pelican Staff: The catalytic converter faults are indicating faulty cats. They are likely faulty, check if the exhaust is sealed first to rule out an air leak.

p16a7 doesn't come up for me. The shifting and EML may be related to a faulty throttle housing. - Nick at Pelican Parts
 
sharp Comments: 2002 323i that was miss firing 1, 2 ,3 cylinders. also had a code for O2, bank 1, sensor 1 faulty. I replaced the O2 sensor and now it will crank but not start. I checked all fuses and relays, they seem to be fine. im thinking the DME went bad not the O2 sensor. what are your thoughts. thanks
February 11, 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. Are there any fault codes? Once you figure out what is missing, it will be easier to diagnose.
- Nick at Pelican Parts
 
mike Comments: I have a bmw 325ci my my car is miss firing and o e of the ignition coil isnot giving signal to spark...the number 2 ..what can cause this anyone can help ...
December 22, 2015
  Followup from the Pelican Staff: If there is no spark, it could be faulty coil, fault power, ground or signal from the DME to the coil. - Nick at Pelican Parts  
rossbw Comments: have a 2003 325xi with 190k goes in to limp mode when trying to pass some one at 70mph the number 3 misfires. when I pull over and shut off car and turn back on it resets as long as I do not floor vehicle it starts and runs smoothly. I have changed all plugs and coils and also fuel pump. any ideas
December 1, 2015
  Followup from the Pelican Staff: I would check spark, fuel and compression on all cylinders.
This will help narrow down the misfire. - Nick at Pelican Parts
 
Billy T. Comments: ok so i fixed that other issue it was a bad connector to the the sensor which i now fixed. now i still have that issue with the ECM and i was told i need to reprogram it as this will also clear out phantom codes that are stuck. does this ECM reflashing piece do this while updating the system?
November 23, 2015
  Followup from the Pelican Staff: No, it only updates the performance map. - Nick at Pelican Parts  
Kim Comments: If you replace the Ecm in a 2005 BMW 325xi does it need to be reprogrammed by the BMW dealer?
November 21, 2015
  Followup from the Pelican Staff: Yes, or someone with an advanced BMW scan tool. - Nick at Pelican Parts  
Billy T. Comments: do you also think my software could be corrupt being its saying i have other codes when its trying to be inspected yet every other code reader says no codes and the monitors are not ready. its been doing this for a few months now. i was thinking of getting the software flasher you have if it would solve this
November 18, 2015
  Followup from the Pelican Staff: Hard to say. I would address the one fault code. If you are able to remedy it, there are likely other issues. Software is not usually a fix for something like this. - Nick at Pelican Parts  
Billy T. Comments: also sorry i have a 2003 325xi
November 14, 2015
  Followup from the Pelican Staff: Thanks, got it. - Nick at Pelican Parts  
Billy T. Comments: cant seem to get the P2185 code off. i replaced the lower coolant sensor 3 times in case it was a defective sensor. any thoughts of what it could be? also i went to get an inspection and i was told i had bank 1 and 2 codes but when its read on an obdII scanner it shows only the P2185 code. could this be an issue with the ECM software?
November 14, 2015
  Followup from the Pelican Staff: If the code is back after a new sensor, you either have a defective sensor or a damaged wiring harness. I would check the wiring harness in the areas it bends around the engine compartment. - Nick at Pelican Parts  
Rey Comments: I just got my old 2003 BMW 325i which my daughter drove for 10 years. I think I have some serious electronic problems. Door won't automatically lock when I start driving. The fob key opens and closes the door but no sound. Panic button doesn't activate the siren or horn. It used to be that the door wouldn't open from the inside but that has been fixed. The warning light for headlamp turns on for a while much longer than the rest of the warning lights, but will go off afterwards. Can you help?
September 19, 2015
  Followup from the Pelican Staff: The door snot locking may be a function that needs to be activated, may have been switched off in coding. Same with the remote key.

As far as the headlight warning. There may be an issue with the wiring, bulb or module. Check the vehicle for fault codes. - Nick at Pelican Parts
 
Monkey boy 1 Comments: Got a UK E46 328 auto on a 2000 plate W which had had a massive short circuit issue. Battery shorted out. I think ECU has been fried. Would I need an ECU, EWS & gearbox ECU plus reprogrammed key to sort it ?
Key in, ignition on all OK, will not crank over. Fuel pump primes OK.
I know it's a difficult one to fathom out in a few words on here but any info will help.
September 10, 2015
  Followup from the Pelican Staff: Best bet is to scan the vehicle and see what modules are online and / or reporting issues. Then replace what is not communicating, after confirming the module has power, ground and data to it. - Nick at Pelican Parts  
Billy Comments: I have a 2001 325i with a cranks won't start issue. Scan tool shows no codes and I have no crank signal to the ECM. Crank pos sensor is new. Are there any common issues with the harness? I still looking for the ECM and sensor pin-outs....
September 7, 2015
  Followup from the Pelican Staff: If there is no crank sensor signal to the DME, check that the sensor has power, ground and signal (at the sensor). This will confirm or deny a faulty harness. - Nick at Pelican Parts  
ernie Comments: So my I remember when I tried turning on the car, before all this happened, It did the same thing. Then I tried my other key and it cranked with no problem. It seems as though now both of my keys are like that. How is it that even with the first key all the lights went on but wouldnt crank? Could it have happened to my second key as well?
September 3, 2015
  Followup from the Pelican Staff: Could be a bad key, antenna or module. I would start by checking the vehicle for fault codes. If the system is not working properly, a fault code will be set. This will be your best bet when diagnosing.
- Nick at Pelican Parts
 
ernie Comments: So my 330ci seemed to have trouble starting yesterday. First seemed like low battery so charged it and tested fine at 80% batt life, then battery began to lose charge. Bought replacement battery hoping it would resolve the issue but now the engine wont even crank. Is there anything the relates to the dme that needs to be programmed in order to allow the engine to start? perhaps due to the battery replacement?
September 3, 2015
  Followup from the Pelican Staff: No. Then engine will crank after replacing a battery, even if the battery isn't registered. - Nick at Pelican Parts  
momycocy@aol.com Comments: 2004 330CI Coupe
What part hardware and software do I need for Reflashing the ECM
September 1, 2015
  Followup from the Pelican Staff: For performance, http://www.pelicanparts.com/catalog/shopcart/BMWM/POR_BMWM_HOL13a_pg3.htm - Nick at Pelican Parts  
CMAR Comments: Holy S#*T Nick. Wes sold me me a correct new mass air flow sensor. In addition to the new wiring harness, that i will add was a huge ass pain to install, my car now runs like it came off the production line. Now I have neck pain from just tapping the gas peddle as I'm thrown back into the seat. thanks again, your company is the best. CMAR
November 23, 2014
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
csmar Comments: ok nick new wiring harness went in and the same code 102 or 8 depending on the reader, MAF sensor. checked with the manufacture of the sensor and they did not or understand the part number on the sensor. last week almost shot the car with a field artillery cannon.i had a permitting issue the county did not understand hopefully this new sensor i just purchased from wess helps me out. car drives fantastic, a new animal, just can not get rid of this code.lesson learned you must know who you are purchasing expensive parts from, and Pelican is the place. thank you
November 7, 2014
  Followup from the Pelican Staff: New sensor and code still there? I would try to clear all adaptations, see if that helps.- Nick at Pelican Parts  
Ras Bugz Comments: 3 coils went out on me last week I changed them no changes in engine behavior, almost stalling at light and stop signs, what the next move? No codes reading out besides 2 o2 sensors.
August 30, 2014
  Followup from the Pelican Staff: Sounds like a misfire. Check spark, fuel injector pulse and pressure fuel, volume and quality. Once you figure out what is missing, it will be easier to diagnose. - Nick at Pelican Parts  
CMAR Comments: OK Nick, I'm tapping out. A new engine harness it is. Never doubted you. Now excuse me as I go puke. Thank you CMAR
August 23, 2014
  Followup from the Pelican Staff: Did you attempt to run new wires? That would be a much less costly repair. - Nick at Pelican Parts  
cmar Comments: Nick, not the valve cover leak causing obd 102. Checked bimmerfest for MAF wiring harness. Disastrous I have continuity at the red/white and yellow to ground with the key in the house. Short. Do I need a complete engine harness or is a pig tail to the MAF available. This is not looking very pleasant. 2001 325i sedan
August 21, 2014
  Followup from the Pelican Staff: There may be a pigtail available. You could also replace just the damaged wire, run a new wire, then crimp and heat shrink it.
Give our parts specialists a call at 1-888-280-7799 and they can help figure out which part or repair kit you need.
- Nick at Pelican Parts
 
CMAR Comments: 2001 BMW 325I, CAN NOT GET RID OF 102 CODE FOR LOW MAF SENSOR OUTPUT. NEW MAF SENSOR, INTAKE GASKET, GAS CAP, CRANKCASE PRESSURE REGULATOR, CONNECTIONS AT SENSOR CHECKED AND APPEARS TO BE TIGHT. INTAKE BOOTS CHECKED OK WHEN CRANKCASE PRESSURE REG REPLACED. CLEAR THE CODE AND ITS GOOD FOR ABOUT 30 MILES AND IT REAPPEARS. CAR DRIVES FINE WITH OUT ANY SPEED LOSS OR HESITATIONS. DEALING WITH THIS ISSUE FOR 6 MONTHS. 2 VACUUM THAT RUN FROM BOOTS ?. ANY HELP WOULD BE MUCH APPRECIATED. THANK YOU
July 22, 2014
  Followup from the Pelican Staff: I would go to the DME and check the signal from the MAF to the DME. I would guess you have a shorted wire. - Nick at Pelican Parts  
BKL Comments: I'm sorry 2001 BMW 330 xi with the MS 43.0. I don't know how I forgot to put the vehicle type.
June 7, 2014
  Followup from the Pelican Staff: You should be able to recode it. You will need a factory level BMW scan tool. - Nick at Pelican Parts  
BKL Comments: Does it matter to the ECU if the car is an automatic or manual shift? Do I need to get one from a 330? an xi? And a manual? I know the auto has an extra relay or 2 in the e-box.
Also, Chilton states if a new ECU is installed it will need to be re-calibrated by BMW. Is that so?
June 2, 2014
  Followup from the Pelican Staff: Yes and no. It may able to be recoded (depending on year, etc) to match your vehicle. A shop with current BMW programming equipment should be able to handle it. - Nick at Pelican Parts  
amarildo Comments: ola minha bmw 328 e 46 1999 ,esta com problema de não funcionar os ponteiros de , velocidade e eocnomia de conbunstivel,o q devo fazer?.
February 2, 2014
  Followup from the Pelican Staff: The cluster may be faulty. Check the vehicle for fault codes using a BMW scan tool. - Nick at Pelican Parts  

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Page last updated: Fri 12/9/2016 02:20:29 AM