Replacing Fuel Pump - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 01-01-2006, 09:55 PM
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Replacing Fuel Pump

Does anyone know how big of a job this is?
After 2600km seems like fuel has stopped been pumped into car.
Unable to start. Electronics and sparks seem fine.

When fuel is pressurised after aprox 10 min. Car suddenly starts but stalls.
Thanks.
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#2 (permalink) Old 01-02-2006, 12:06 AM
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The job is not that bad. The gas tank is under the rear seat. Pull the bottom seat cushion out. The fuel pump is located behind the driver's side on LHD cars, and on the passenger's side on RHD cars. There is a DIY at www.pelicanparts.com.


Could you also have a clog in the fuel lines?

1995 325I, window tint, K&N, debaffled airbox, BMW #104 wheels, Nighthawk low beams, smoked side markers, smoked corners, smoked taillights, M3 stlye heated mirrors, various interior bits, Bosal cat-back.
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#3 (permalink) Old 01-02-2006, 02:32 AM
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All i know is that i had just travelled 1200 k's Today and it just cut out, lost all power from the accelator.
When Listening it seems the fuel pump is no longer working.

When trying to start the ignition the car will not turn over, the spark plugs seem to be doing there job, seems there is no fuel Flowing through.

After leaving the car while and letter the injectors re-pressurise it will start to kick over but altimately stalls due to no fuel flow..

Any other opinions will be great

Thanks
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#4 (permalink) Old 01-03-2006, 01:12 PM
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Check voltage to the pump...

The fuel pump in the tank is usually on the right side under the rear passenger seat. The seat is removed by just yanking up on the front and pulling out, no bolts involved. The fuel pump / sending unit assembly is about $150, the other side will have just a sending unit alone and it's about $40 to replace. You can spin the retaining ring off with a 1/4" socket extension and carefully tap it around to spin it free. Check that the fuel pump is in fact getting voltage with the key ON first.





Mike
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#5 (permalink) Old 01-03-2006, 09:57 PM
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test the voltage going to the motor first? that'd be a good place to start
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#6 (permalink) Old 01-03-2006, 11:19 PM
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Quote:
Originally Posted by mmclaren
After leaving the car while and letter the injectors re-pressurise it will start to kick over but altimately stalls due to no fuel flow..
theres no chance of water or any debris in the fuel is there? you could always remove the back seat and try to start the car while watching and listening to the fuel pump to see if it is doing anything. after all, it is right there in the car. or have someone else try starting it while to inspect the pump. hopefully, if it is clogged, then it is the pump and not the line somewhere inbetween!
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#7 (permalink) Old 01-03-2006, 11:32 PM
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fuel pumps are a peice of cake...easy to get to (pop up the rear seats) and easy to pull out and put in...
however the preparation and fuel safety precautions and doing it so your cabin will not be consumed by toxic odors for weeks is a real pain in the ass.

good luck.

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#8 (permalink) Old 01-03-2006, 11:51 PM
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Quote:
Originally Posted by Delmarco
however the preparation and fuel safety precautions and doing it so your cabin will not be consumed by toxic odors for weeks is a real pain in the ass.
haha, sounds like you've had some experience with this del

...bad ones at that,
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#9 (permalink) Old 01-04-2006, 12:13 AM
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Quote:
Originally Posted by kyle_baker
haha, sounds like you've had some experience with this del

...bad ones at that,
oh no...not me...this is all stated in the DIY section from the Pelican DIY pages for E36 BMW.

:lol:

oh i forgot to menton that ...see the DIY pages.

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#10 (permalink) Old 01-04-2006, 12:39 AM
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Checked the voltage already forgot to mention that...
Voltage was fine..
Also i used an alternate method of listening for the fuel pump, its called screwdriver in the fuel tanker and using my ear with a friend trying to start it.. No sounds...
Well Drove 500k today with a new fuel pump to get my car fixed
and well...
Everything in that deparment is perfect, cruised home at 140k's an hour in 45' Celcius heat, no problems
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#11 (permalink) Old 01-04-2006, 09:40 AM
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nice.. replacing the fuel pump is good preventative maintence anyways. When i did mine it took 45 minutes and was simple. The old pump was filthy and I got better mileage afterwards.. do it if u got well over 100k mi..

Complete mod list and pics:

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