loss of fuel pressure - TriStateTuners.com :: Home of Tristate Auto Enthusiast

delphinE30 · 09-26-2009, 11:36 PM

long story short....car ran normal, all of a sudden i have no power, smooth accel but just no power. next day i sart the car its normal. i replace the fuel filter. (very dirty) still lost pressure. replaced the FPR and checked fuel pumps and related fuel items. hooked up a FP gauge and it was good. good untill i rev it above 3,500 full throttle. it cuts....just no power no hesitation or anything just blah no power. sawpped ECUs and did the same thing. im completely lost now........

05OCsrt-4 · 09-26-2009, 11:38 PM

sounds like possibly the filter in the fuel tank or the fuel pump is taking a crap

delphinE30 · 09-26-2009, 11:47 PM

yea but only at higher R's and reset fuel pressure when the car is restarted?? o and i have 2 fuel pumps

enigma · 09-27-2009, 03:50 AM

Are the pumps inline, or parallel draw?
If one of the inline pumps takes a crap, or has stuff in it, it will create a parasitic load on the other pump.

delphinE30 · 09-27-2009, 09:21 AM

yea we did think of that. we tested the main pump and it seemed to be alright. but ill probly just rip it out and see whats up with.

09-26-2009, 11:36 PM	#1
delphinE30 Tri-State Addict Join Date: Sep 2009 Member #14644 My Ride: 1987 BMW 325is iTrader: (0)	loss of fuel pressure long story short....car ran normal, all of a sudden i have no power, smooth accel but just no power. next day i sart the car its normal. i replace the fuel filter. (very dirty) still lost pressure. replaced the FPR and checked fuel pumps and related fuel items. hooked up a FP gauge and it was good. good untill i rev it above 3,500 full throttle. it cuts....just no power no hesitation or anything just blah no power. sawpped ECUs and did the same thing. im completely lost now........ __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

09-26-2009, 11:47 PM	#3
delphinE30 Tri-State Addict Join Date: Sep 2009 Member #14644 My Ride: 1987 BMW 325is iTrader: (0)	yea but only at higher R's and reset fuel pressure when the car is restarted?? o and i have 2 fuel pumps __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

09-27-2009, 03:50 AM	#4
enigma Tri-State Addict Join Date: Oct 2006 Location: Glenolden ,PA Member #2659 My Ride: Hoopties galore iTrader: (0)	Are the pumps inline, or parallel draw? If one of the inline pumps takes a crap, or has stuff in it, it will create a parasitic load on the other pump. __________________ 2001 Dakota Quad Cab, 1996 Ford F250, 1993 Honda Civic, 1991 Eagle Talon, 1970 Plymouth Duster.

09-27-2009, 09:21 AM	#5
delphinE30 Tri-State Addict Join Date: Sep 2009 Member #14644 My Ride: 1987 BMW 325is iTrader: (0)	yea we did think of that. we tested the main pump and it seemed to be alright. but ill probly just rip it out and see whats up with. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

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