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Pelican Technical Article:

911 Fuel Pump Replacement

Bob Tindel

Applicable Models:

Porsche 911 (1965-89)
Porsche 912 (1965-69)
Porsche 930 Turbo (1976-89)

Porsche 911 engines need a steady supply of fuel at the correct pressure for good performance.  If the hum from your fuel pump is getting louder, it may be a sign of imminent failure.  When you order your new fuel pump, be sure to get two new copper sealing rings.  (Figure 1)  Here is how to replace it:

The first step in doing any work where the fuel system will be opened is to position the car away from any possible sources of ignition, such as a gas water heater, because you are likely to spill some fuel.  Next, place the front of the car up on jack stands.  (Figure 2)  You need some room to work under the car, so the car should be near the maximum HEIGHT of the jack stands.  I usually place them as shown (Figure 3), with a piece of wood to protect the car.

The fuel pump is located above the splash panel between the front wheels.  To remove the splash panel, take off the two 17mm nuts, and the two 8mm allen-head bolts.  This panel is a bit heavier than it looks, so be sure to support it when you take off the fasteners.  (Figure 4)

To remove the fuel pump, disconnect the two electrical wires, taking note of which is positive and which is negative.  Then unscrew the 19mm cap nut that holds the fuel outlet line (you may need to counterhold this fastener with a 15mm wrench).   Loosen the hose clamp holding the fuel pump, and you are ready to take off the pump.  Loosen the clamp holding the fuel input line, remove the pump, and replace it with the new pump.  You will need to work quickly during this part of the procedure to prevent spilling a lot of fuel (Figure 5).

Use two new copper sealing rings, one on each side of the banjo fitting, when replacing the fuel outlet line.  Reattach the wiring, making sure that the positive and negative wires are correct.  Tighten the fuel inlet line, and replace the sponge piece next to the fuel pump, which is a sound deadener.  Replace the splash pan, and you are done.

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Figure 1

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Figure 2

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Figure 3

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Figure 4

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Figure 5

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Comments and Suggestions:
Paulh Comments: Hi have jutst had new fuel tank put in 911 s 1974 from you guys car feels like it's running out of fuel. Stars and runs ok when power needed splutters backfires but can tick over ok restarts ok have also found a loose wire in rear near fuel filter any ideas ?
July 31, 2014
  Followup from the Pelican Staff: Could be a fuel delivery issue. Start by looking for the other end of that wire. I would perform a fuel delivery system test. Check fuel pressure, volume and quality.
- Nick at Pelican Parts
 
Tom Comments: I THINK ITS THE FIRING SYSTEM, COULD THE COIL CAUSE IT TO JUST SHUT DOWN IF I DOWN SHIFT IT AND POP IT INTO GEAR IT STARTS BACK UP, ONLY TO SHUT DOWN AGAIN 5 MIN LATER , WHEN I GOT IT HOME I WUOLDN'T START SO I PUT STARTING FLUID IN THE CARBS STILL WONT START. SO I THINK ITS IN THE FIRING. WHAT DO YOU THINK
July 21, 2014
  Followup from the Pelican Staff: I suppose anything is possible. You need to test the firing kv output of the coil. - Nick at Pelican Parts  
TOM Comments: 1973 911 SC WITH WEBER CARBS JUST SHUTS OFF WHEN DRIVING
WHATS GOING ON?
July 19, 2014
  Followup from the Pelican Staff: What is going away when it shuts off? Battery voltage? Spark? Fuel? - Nick at Pelican Parts  
Albertini Comments: I have a 88 Carrera . When driving in rain, the engine begins to sputter and if it's a heavy rain, ultimately stalls. It restarts once it dries out. I'm pretty confident it's fuel related and can't help but wonder if it's the electrical leads to the fuel pump. Am I off base or if not, how can I validate my suspicion?
July 16, 2014
  Followup from the Pelican Staff: Sounds like bad ignition cables to me. I would check the ignition cables for a voltage leak under load. - Nick at Pelican Parts  
Ozi Comments: Hi I have a targa 1983, when started it sometimes cuts out and when warm there is no acceleration it's juddering like a misfire but not. I chaged the fuel pump which I was told but a mechanic said there two fuel pumps. Not sure what to do, where would the 2 nod fuel pump be.
June 13, 2014
  Followup from the Pelican Staff: As far as I know, there is only one fuel pump. have you checked fuel pressure and volume yet? I would start there. - Nick at Pelican Parts  
Sonny Comments: I am currently trying to start my 1975 911S. I know that the fuel pump is bad and I looked for it under the tank after removing the splash pan, but it isn't there. Fuel lines seem to run into the center console of the car or between interior and exterior floor pans. I have also located my power wires that connect to the fuel pump they heat up when I turn on the key. The only thing is I can't seem to locate the fuel pump itself. Any help would be appreciated. Thanks
May 31, 2014
  Followup from the Pelican Staff: It's in the center of the underbody, behind an L-shaped steel panel. - Nick at Pelican Parts  
Luiz911SC Comments: Hi Nick. Understood. I'm having trouble to find the correct fuel pump relay in Pelican's catalog. Can you help me with that? It's for a 1982 911SC Targa.
Thanks,
Luiz
May 11, 2014
  Followup from the Pelican Staff: Unfortunately I cannot access the parts catalog. Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
Luiz911SC Comments: Folks, I just bought a 1982 911SC and there is no Fuel Relay, just a jumper between terminals 30 and 87.
I read Nick's comment on 02/09/2014 saying that would be OK for testing the pump.
Is there problem if I leave that way? What is the risk in doing so?
I can't find this fuel relay in Pelican.
Thanks
May 4, 2014
  Followup from the Pelican Staff: The risk is the fuel pump will run when it is not commanded ON by the relay. I would install a new relay or repair whatever is faulty. - Nick at Pelican Parts  
DanPez Comments: Thanks Nick for the quick reply!
The regulator is another issue. There was no inline regulator. I purchased a Holley low pressure regulator 1-4 psi so I can fine adjust the pressure once fuel flows through the carbs.
Dan
March 2, 2014
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
DanPez Comments: I have a 73 911T-V with Zenith's that has fuel pressure problem coming into the carbs. Flow is good but overflows
The fuel pump is a 911.608.107.00 3 port type
Bosch part number – 058096 0009
Operating Pressure – 0.3 bar 4.3 psi
Pressure relief valve opens from – 0.2-0.3 bar 2.8-4.3 psi
Instead I am getting 15psi and higher going into the carbs.
A blocked or restrictive return line would cause this issue?
And if I were to remove the return line, from the pump, and dump it in a bucket instead of going to the tank that'll confirm if the return line or if its the pump right?
Thanks in advance
March 1, 2014
  Followup from the Pelican Staff: yes and yes. Be sure the regulator is OK. Then you can redirect the return line and see if pressure drops. - Nick at Pelican Parts  
Desert911 Comments: Thanks for the help,I put the fuel pump back in and it been working good. The relay seems fine so I must have a bad connection somewhere.
February 19, 2014
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
Desert911 Comments: I removed fuel pump and it works fine with 12v.
Mike
February 9, 2014
  Followup from the Pelican Staff: If the vehicle was sitting, the pump may run but be worn. - Nick at Pelican Parts  
Desert911 Comments: Hello
I've been reading various threads to try and find a solution to my problem. My 1980 911 has been sitting for a while,I'm trying to get it started now and it's not getting gas. I didn't hear the fuel pump making any kind of noise so I check for 12v going to it and no 12v.fuse is good,how do I check relay?
Any other ideas why I wouldn't be getting power to fuel pump?
Thanks
February 9, 2014
  Followup from the Pelican Staff: The fuel pump relay may be faulty. You can remove it, then jump the fuel pump terminals 30 and 87, if the fuel pump runs, the relay may be faulty. - Nick at Pelican Parts  
carlsonroad Comments: I've got a 82 911 sc. The fuel pump was periodically making a loud whirring/buzzing sound. I changed the fuel pump and noticed the old one was very new looking I just purchased the car. The new fuel pump immediately started the same periodic whirring. Sometimes it would start after a minute or so and sometimes I could drive it for an hour without any whirring.
December 29, 2013
  Followup from the Pelican Staff: I would check that the pump is getting good power and ground. If not, it could be laboring. - Nick at Pelican Parts  
acowden Comments: Nick: Surry for the delay in responding - I forgot to mention that I have already replaced the fuel pump with one i got from Pelican parts, and I still have the same symptoms. I am suspecting bad fuel flow. The fuel filter was replaced @ 10,000 miles ago, but the in-tank fuel filter has never been replaced, and I suspect the car was not run regularly for many years 75,000 miles since 1975. My plan is to replace the in-tank fuel filter and see if the tank needs cleaning - my theory is that there is gunk in the tank that slowly accumulates around the in-tank fuel filter until it interrupts the fuel flow - as the car sits the gunk falls away so that it can restart again.

Your thoughts?

Tony
November 18, 2013
  Followup from the Pelican Staff: The filter could be plugged. Have you test volume out of the pump? A good rule of thumb is a pint in 30 seconds. - Nick at Pelican Parts  
Whitey Comments: Nick
Checked electric fuel pump and found about 1 psi pressure right at pump-and this was erratic flow too. Decided to bite bullet and purchase new fuel pump-not a rebuilt one. The vacuum lines were replaced and portals cleaned.
November 15, 2013
  Followup from the Pelican Staff: Thanks for the follow up. Let us know how it works out. - Nick at Pelican Parts  
airfix4 Comments: This may be slightly off topic, but what are the hoses shown in fig. 4 running on the bottom side of the undercarriage? My 1970 T has the clips, but there are no hoses. Are they for a factory oil cooler?
November 13, 2013
  Followup from the Pelican Staff: It does look like an oiler cooler hose to me. - Nick at Pelican Parts  
Whitey Comments: I have a l973E with 43,000 actual miles on all original car. As you can tell the car sits 99% of the time since I work away from home. I do all the standard maintenance myself as required including valve adjustment, changing of all hoses, oil, filters, belts, etc. as required for a car 40 years old. I currently am having issues with the engine that will only start when cold or immediately after shut down. It will also not run smooth when running, for example missing, poping and rough when engine speed and car speed match. The engine seems to do fine under full accelteration. I have installed new spark plugs, filters, cleaned fuel injection thermostat, points, etc. Can you help me with this problem.
October 10, 2013
  Followup from the Pelican Staff: Have you checked for vacuum leaks and tested the fuel delivery system? - Nick at Pelican Parts  
momo Comments: Hi ,just start the 993 after a while during these very hot days,started moved few metres and then it stopped,tried few time no luck it sounded like there is no fuel? got a gallon than tried again no luck.but i notice when you turn the ignition on normally you hear a sound this was absent? Any help???thanks
July 19, 2013
  Followup from the Pelican Staff: Are you stating the fuel pump isn;t making any sounds? If it is not activating and it is received power and ground, the pump itself could be faulty. - Nick at Pelican Parts  
Frank Comments: I have a 1971 911 T with Zenith carbs. Fule pump was bad but I found someone to repair it. I can't remember which outlet is the overflow and pumps back to the gas tank. The large hose pulls gas from tank, one goe to carbs and one goes back to tank. One has a bypass on it. Does that go to carbs or back to tank? Thanks...
May 31, 2013
  Followup from the Pelican Staff: Here are two great threads with info on the Zenith crabs:

http://forums.pelicanparts.com/porsche-911-technical-forum/602782-1970-911t-fuel-pump-zeniths.html

http://forums.pelicanparts.com/porsche-911-technical-forum/602782-1970-911t-fuel-pump-zeniths.html

- Nick at Pelican Parts
 
ade Comments: i have 911 on 2001 wont start check fuel non at filter no feed to fuel pump just replaced engine in it due to overheating check fuses all ok relay seems to be ok eney idiers ??
May 15, 2013
  Followup from the Pelican Staff: Have you checked power and ground to the fuel pump? I would start there.- Nick at Pelican Parts  
acowden Comments: I have a 1975 911S 2.7L - fuel pump stops after 35-45 mins of driving, once with a backfire. Sometimes restarts instantly, sometimes takes 10-20 mins before it will restart. No fuel pump relay in fuze box. Any ideas?
December 22, 2012
  Followup from the Pelican Staff: Sounds to me like the fuel pump itself is faulty. - Nick at Pelican Parts  
raku artist Comments: Is there a gasket kit for 912 fuel pump? I took it apart to check out the filter and now it leaks .
August 12, 2012
  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  
Dan911/22 Comments: I have a 911 1991 Carrera 2, Engine light turns on while I'm driving, the car feels like I am running out of gas and does backfire when I press the gas pedal... I replaced the DME relay and the oxygen sensor, but still happens. I have to pull over, shut off the engine and restart, after 2 or 3 times, it finally turn back to normal.
Could it be the fuel pump? Or what else...?
June 15, 2012
  Followup from the Pelican Staff: I would perform a fuel delivery system test. Check fuel pressure, volume and quality. - Nick at Pelican Parts  
Joe Comments: Hello!

Where is the REAR fuel pump of a 1991 911 turbo? And does it differ from the front one? or are they the same ?

Thanks,

Joe
May 30, 2012
  Followup from the Pelican Staff: There is only one fuel pump in the vehicle. Give our parts specialists a call at 1-888-280-7799. They can help you find the right part. - Nick at Pelican Parts  
Joe Comments: Have a 1991 Turbo 3.3L...Fuel pump relay overheats and car stops suddenly! After relay cools or I install a new one car runs normal...for about 1hr or so then it starts again and so-on.....please advise...

Joe
May 2, 2012
  Followup from the Pelican Staff: I would perform a fuel delivery system test. Check fuel pressure, volume and quality. Also check fuel pump amperage draw. A draw of over 5 amps indicates that there is blockage in the fuel system or the fuel pump itself is worn. Too high an amperage draw during normal operation will overheat the relay.- Nick at Pelican Parts  
philk Comments: Just bought a 1987 924s and it died on the way home..was humming along about 80mph when it just ran out of power..previous owner hadn't driven it much, replaced fuel pump recently..said sounded like fuel problem he had..can not hear pump working when key turned or when started..will ck power to pump soon, but feel I should replace filter...any thoughts?
April 2, 2012
  Followup from the Pelican Staff: I would perform a fuel delivery system test. Check fuel pressure, volume and quality. - Nick at Pelican Parts  
Colin Comments: I have a 75 911s and the fuel pump is located in front of the rear left wheel half shaft above the sway bar.
March 30, 2012
  Followup from the Pelican Staff: Thanks for the additional Info. We appreciate it.
- Nick at Pelican Parts
 
Tom Comments: Can anyone tell me what the correct fuel pressure should be on a 1979 Porsche 911 Turbo? It has fuel injection as well. Any help greatly appreciated!
January 25, 2012
  Followup from the Pelican Staff: Look for the Bosch pamphlet on CIS fuel injection which explains this system, how to test fuel pressure and what the results mean. Maximum system pressure is 6.2 bar (89 psi). - Nick at Pelican Parts  
Steve Comments: 1999 C2 carrera. When gas tank is half full, car stalls and is difficult to start.When tank is full starts right away but after running for a while intermittant restart failure .Whats Up?
December 23, 2011
  Followup from the Pelican Staff: I would perform a fuel delivery system test. Check fuel pressure, volume and quality. Also, inspect the bottom of the fuel tank for damage. - Nick at Pelican Parts  
corradostu Comments: Hi i have a corrado 1.8 16v al ov a sudon it just stops running it starts up then i leave it running for 5 mins or drive for 5mins then al ov a sudden it stops running iv changed the sender in the tank and the pump motor and it still does it i can her the normal pump noise then it start then leav it 5 then wen it cuts out tryed starting it and no noiise any ideas pls could it b my accumilater thanx stu
November 13, 2011
  Followup from the Pelican Staff: This site is for Porsche issues. However, in your case, I suggest a fuel delivery system test. Check fuel pressure, volume and quality.
- Nick at Pelican Parts
 
dan Comments: I have a 85 911 3.2 with intermitten starting problems. Now it will not start at all. When I turn the key to run possition should i be able to hear the fuel pump run until pressurized
November 6, 2011
  Followup from the Pelican Staff: I would perform a fuel delivery system test. Check fuel pressure, volume and quality.
- Nick at Pelican Parts
 
burnt2offen Comments: hi what would cause a 1999 porsche boxster with a 911 motor and trany when i push the start button it starts right away but shuts off within 6 seconds or if i press the gas sometimes sooner saying that some times it works great for weeks scared to drive too far incase it leaves me stranded it just shuts down for no reason i had this looked at by man certified mechanics and even the porsche dealer couldnt fix the problem all the electrical has been replaced and the computers also have been replaced any advice would be greatly appricated thanks
August 30, 2011
  Followup from the Pelican Staff: I'm not sure - if the dealer could not diagnose the problem with the factory tool, then it must be some type of intermittent problem that may not show up during testing. I will copy this question to our Boxster forum, and perhaps someone there has some additional input. - Wayne at Pelican Parts  
nardstrom Comments: I have a 1970 911T engine with Zenith carbs and the fuel pump needs replacement. The fuel pumps are rather expensive and hard to find over $240 for a used one. Is there an alternative, perhaps a later CIS pump with a pressure regulator? If so, what regulator should I use and how should I install it? Thanks
August 30, 2011
  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  
rabbit Comments: hi av a 1981 3.0 sc when i turn the key to start i can hear a fan from the engine bay.can i drive it or is this a problem
August 19, 2011
  Followup from the Pelican Staff: Investigate and see where the noise is coming from. - Nick at Pelican Parts  
Dan Comments: Do you have information on the pressure generated by 1973 Porsche 911 T fuel pump necessary to open the injectors. I think my pump is weak but it does pump. It will not open my new injectors.
July 11, 2011
  Followup from the Pelican Staff: I would perform a fuel delivery system test. Check fuel pressure, volume and quality.
- Nick at Pelican Parts
 
Skinny Comments: I am getting ready to replace the front fuel pump on my 1986 930 turbo it's humming loudly. Do I need to replace anything else like a filter, etc? If so what do I need to change and where is it located.
June 19, 2011
  Followup from the Pelican Staff: Also replace the fuel filter in the left side of the engine ciompartment. - Nick at Pelican Parts  
Jokke Comments: Hello.
Can someone please show me where the rear fuel pump on the 930 turbo is located?

Is this difficult to change?
June 10, 2011
  Followup from the Pelican Staff: It is not bad to change. This tech article, although not for the 930, should help. http://www.pelicanparts.com/techarticles/911_fuel_pump/911_fuel_pump.htm It is located under the vehicle. - Nick at Pelican Parts  
worthy Comments: hi i have a 1985 porsche 3.3 911 turbo 930 model can you tell me where the dme relay is fitted if it has one. regards worthy
May 29, 2011
  Followup from the Pelican Staff: it is located under the driver seat. - Nick at Pelican Parts  
rob Comments: i own a 1979 280 e with 228000 miles on it . so decided to change the fuel injectors. ever since then i have had problems starting the car 10 minutes after driving. it takes 3 or 4 cranks to get her to start up. i have been reading that it could be the fuel accumulator . could that be the problem? any help would be great.
March 29, 2011
  Followup from the Pelican Staff: I would perform a fuel delivery system test. Check fuel pressure, volume and quality. - Nick at Pelican Parts  
2porscheguy Comments: Wayne, just a follow up to my last question....so you would probably not suspect a faulty fuel accumulator in this case.......correct?
March 21, 2011
  Followup from the Pelican Staff: I'm guessing that it could be the accumulator or the check valve. You might be hearing the check valve leak internally back into the tank and make noise when you shut off the ignition. Putting a fuel pressure gauge on the lines after the accumulator might give you some more clues. - Wayne at Pelican Parts  
2porscheguy Comments: I have a 1980 911SC Targa with 130,000.00 KM. It seems at times when the engine is above 4000RPM that there is a lot of hesitation followed by "surging", almost like there isn't enough fuel being supplied to the engine. I recently changed the air filter, the fuel filter but not the accumulator. Would you suspect the accumulator or the fuel pump to be faulty? Also, at times, upon turning off the engine, but not the ignition, I can hear the distinct humming of the fuel pump.....faulty fuel pump?
March 17, 2011
  Followup from the Pelican Staff: It's very difficult to diagnose issues like these over the Internet. However, the "humming" of the fuel pump is normal, although I'm not sure if you should hear it when the car is not running. - Wayne at Pelican Parts  
JC Comments: I OWN A 1985 PORSCHE 911. THE CAR TURNS OVER BUT IS NOT CRANKING. I noticed the fuel gauge is not working. Any idea what's wrong?
February 27, 2011
  Followup from the Pelican Staff: It could be one of a hundred different things. I'm going to copy your question over into our forums so that our members can try to assist you with this. - Wayne at Pelican Parts  
Ib58 Comments: I have 1998 911 carrera which recently run low on fuel and then filed it up since then it's running sluggish at high end speeds and makeing a winding noise under front end is it poss the fuel pumb or fuel filtter
January 21, 2011
  Followup from the Pelican Staff: It could be - when the tank runs very low on fuel, the pump sucks up a lot of crap that often accumulates at the bottom of the tank. I would take a close look at the fuel pressures coming out of the pump and check to make sure they are within spec. - Wayne at Pelican Parts  
WARE Comments: I OWN A 1988 PORSCHE 930. THE CAR TURNS OVER BUT IS NOT CRANKING.IF I KEEP TURNIG THE ENGINE OVER AFTER A WHILE THE CAR WILL START. WHEN I STOP AND TURN THE ENGINE OFF,I HAVE NO PROBLEM RESTARTING THE CAR.I THOUGTH MY PROBLEM WAS THE FUEL ACCUMALATOR.SO I REPLACED THE FUEL ACCUMALATOR THINKING THAT WAS THE PROBLEM. BUT AFTER REPLACING THE ACCUMALATOR I STILL HAVE THE SAME PROBLEM.SO COULD I HAVE A BAD FUEL PUMP? YOU SHOW WHERE THE FRONT PUMP IS LOCATED BUT NOT THE REAR ONE. DO YOU AHVE AN ARTICLE SHOWING THE LOCATION OF THE REAR ONE? THANKS.
January 21, 2011
  Followup from the Pelican Staff: The fuel accumulator works in conjunction with a check valve located within the fuel pump. If this valve is faulty, then the car will have difficulty starting, particularly when it's hot. You might want to investigate the pump as a potential issue here. - Wayne at Pelican Parts  
derrick Comments: When I start my 1988 930 after it sits over night the engine will turn over but the vehicle won't start.I turn the key back to off and then to on but not enough to start the vehicle and I listen for the fuel pump to see if it is working.If I don't hear anything I turn the switch back to off. I again turn the switch on but not enough to crank the vehicle. I will hear a loud screaching sound for a few seconds at the left rear of the car and then the sound of the pump running. I turn the switch back to off. I then turn the switch completely to crank the vehicle and the vehicle cranks. I can drive the vehicle all day with no problem starting it after stopping and shutting it off.I only have a problem when the car sits over night. Is it the fuel pump or accumulator or any idea?
December 31, 2010
  Followup from the Pelican Staff: I'm out of town right now, so I don't have access to my technical manuals. But I will copy this to the forums, and perhaps the members there can also assist. It sounds like it could be a stuck fuel pump, or a worn out fuel pump relay, or even a problem with your ignition switch. - Wayne at Pelican Parts  
steve Comments: Hi could you tell me if you can run a 930 turbo without a fuel accumulator, mine was missing when i bought the car, is it only to help with the hot start or does it affect the running and the performace. Many thats steve
December 19, 2010
  Followup from the Pelican Staff: Hmm, the accumulator holds pressure in the system when you shut the car off - it's pretty necessary to prevent hot starts and control the fuel pressure. I'm not sure if it affects performance when running, I've never had to think about that before. Sounds like someone has messed with your fuel system - if there is a pressure regulator and the fuel pressure going into the fuel distributor is even and correct, then I would think the absence of an accumulator wouldn't affect the metering of fuel. - Wayne at Pelican Parts  
Gary Comments: I have an 85 911 3.2 that leaks gas only when I start the car and only once in awhile. I only know that it's coming from somewhere near the fuel pump. Any thoughts?
December 13, 2010
  Followup from the Pelican Staff: That sounds dangerous, I would lift the car up and look under there while someone starts it. It's probably just an old fuel hose that is leaking, and perhaps getting ready to burst! - Wayne at Pelican Parts  
John Comments: fuel pump is leaking o rings are bad can i replace o rings?
December 4, 2010
  Followup from the Pelican Staff: If you can find o-rings that are certified to work with fuel, and are the correct size, then I don't see why not? Bosch doesn't sell a kit with the o-rings - they'd rather sell you an entirely new pump. - Wayne at Pelican Parts  
Bob Tindel Comments: I did a little more research for this article that may be helpful, regarding the location of the fuel pump. In 1971, the fuel pump was moved from the location under the car between the front wheels to a location in the left rear wheel well near the left rear suspension arm. In 1976 it was moved back to location under the front of the car. If you are unsure of the location of your fuel pump, check the left rear wheel well first.

Also, figure 5 in the article shows a fuel pump with evidence of leakage-peeling paint and fuel stains. In this case, it was a fuel line fitting that was improperly crimped at the factory.
September 28, 2010
  Followup from the Pelican Staff: Thanks for the additional Info. We appreciate it.
- Nick at Pelican Parts
 
dirtygreen911 Comments: I found the 1973 911 fuel pump no longer available but there are some for the later models/or very similar ones, showing a remark that little reworking may necessary for 1973 models. Can anybody tell what has to be reworked and how to do that? Thank you.
September 24, 2010
  Followup from the Pelican Staff: There are several threads on this in our forums: http://forums.pelicanparts.com if you perform a search there. You can use a standard Bosch CIS pump inline with a pressure regulator, and it will function perfectly fine. - Wayne at Pelican Parts  
Tony V Comments: I pulled and cleaned the sending unit with carburetor cleaner and sprayed with WD-40 as you suggested. It works fine now. The only thing I would add is that anyone with a handfull of thumbs plug the gap between the gas tank and body to ensure the small nuts and washers don't fall into the abyss forever. I was lucky to not have that happen. Thanks for all your help, you saved me a lot of money.
May 24, 2010
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it. - Nick at Pelican Parts  
Tony V Comments: I checked my fuel pump solenoid and fuel pump with a 12v battery and they both checked out fine. The next obvious was to put gas in the tank that was registering 1/2 full. The car started up fine. So, the problem was not with the fuel pump, but with the fuel gauge or sending unit. Any suggestions? Thanks.
May 22, 2010
  Followup from the Pelican Staff: Yes, simply pull the sender out - you can replace it in about 10 minutes - it's really easy. There's a tech article on our site, I think it's the same as the one in the 356 section. - Wayne at Pelican Parts  
Tony V Comments: I was driving my 1983 911SC when it stalled out. It was like I ran out of gas, but the tank is about 1/2 full. I am guessing that it is a fuel pump, but I can't be positive. Do you agree or is there something else that may have failed. The car turns over fine and everything else seems to be okay. It has been sitting in the garage all winter and I put startron and techron additives in the tank before putting it away. Thanks in advance for your input.
May 20, 2010
  Followup from the Pelican Staff: It could be the fuel pump, the relay, the fuse, or the wiring. I would start with checking the fuse and the relay, and then the pump itself. Also, you "think" it felt like it ran out of gas, but it might be something else, like a clog in a line? - Wayne at Pelican Parts  
sfoote Comments: Please tell me if the fuel pump is in the same place on a 91 C4 thank you
April 27, 2010
  Followup from the Pelican Staff: Similar place under the car, but not exact. - Wayne at Pelican Parts  
jacob Comments: Can you tell me what the psi should be on a 77 911 2.7? Right now I have an aftermarket pump that was tested at 7.2 Bar, or 104psi. Will I damage the WUR or anything else if pressure is too high?
April 10, 2010
  Followup from the Pelican Staff: Sounds you're asking about full fuel system pressure: 6.9 bar = 89 psi. - Nick at Pelican Parts  
new911owner Comments: I have an early 1973 911 that is carburated. My fuel pump is not located where indicated here and I'm not sure where it is. Could you tell me where to look and if it is electric or manual. Just started working on getting it running. I bought it after it was sitting for a few years. Thanks.
March 16, 2010
  Followup from the Pelican Staff: Check out our tech article on the subject:
http://www.pelicanparts.com/techarticles/911_fuel_pump/911_fuel_pump.htm
- Nick at Pelican Parts
 
Scott Comments: I got the pump working in my '73 914 but suction works when I have positive to neg and neg to positive on the test bench. Can these pumps get the polarity reversed? Does it matter if I connect it up that way?
March 13, 2010
  Followup from the Pelican Staff: I would not reverse polarity on an electric pump. - Nick at Pelican Parts  
mrtesmer Comments: Where is and how do I access the fuel pump on a 1975 911S? Seems that this thread does not map out the same location for my 911.
Thanks
March 8, 2010
  Followup from the Pelican Staff: Check out our tech article on the subject:
http://www.pelicanparts.com/techarticles/911_fuel_pump/911_fuel_pump.htm
- Nick at Pelican Parts
 
78scSean Comments: Right now my car won't start and I think it might be the fuel pump. I used to hear the sound of the pump when I turned the key. I hear no sound now except for a very high pitched buzz.

Do you think my fuel pump went out?
January 19, 2010
  Followup from the Pelican Staff: it could be. If the fuel pump is running but the vehicle doesn't start, I would perform a fuel delivery system test. Check fuel pressure, volume and quality.

if fuel pressure delivery checks out, you'll have to look elsewhere. spark, etc.- Nick at Pelican Parts
 
Guy Comments: I've got a 73T with CIS that has been sitting for a couple of years with fuel in the tank. Any recommendations for how to remove the old fuel, flushing requirements or anything else i should do with the fuel system before firing it up?
December 12, 2009
  Followup from the Pelican Staff: The outlet for the tank is on the bottom. Remove the hose (carefully) and drain from there. Or, you can purchase a cheap pump and hook it up to the fuel line in the engine compartment and pump out the old fuel from there. If you check the forums, there are lots of threads on gas tank restoration: http://forums.pelicanparts.com - Wayne at Pelican Parts  
cindee Comments: nice article
September 16, 2009
  Followup from the Pelican Staff: - Wayne at Pelican Parts  
cadavieco Comments: How can I get the fuel pump pressure? Do you know the Bar or Psi that got to have the pump?
Tahks.
June 4, 2009
  Followup from the Pelican Staff: For which car specifically? - Wayne at Pelican Parts  

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