Fuel Pump or Something Else

Ado · 10-29-2008, 01:51 PM

I've read a tone of the fuel pump issues even from the beginning of the problem and was wondering if I'm having the same issue.

I don't have any issues with car going into limp mode. This may be because I haven't been pushing the car in a while since it's really cold and tires don't stick.

My issue is that every morning especially those mornings after the night before I pushed the car into maybe 6K RPM a few times. The car has a problem starting, sometimes I press the start button, hear it crank crank but no go. Then I stop it and press start again to get it to start up.

** Important **: After I start it for the first time, I have no issues starting it after that for the rest of the day as long as the car hasn't been off for lets say 6 or so hours.

To those that have had bad fuel pumps, did you also only have problems during the morning starts?

Thanks,

Ado

Ado · 10-30-2008, 12:35 PM

lol I know many don't care about the issue anymore since it's been beat to the death after we've had so many issues with the fuel pumps.

If any of those who have had fuel pump issues could at the very least comment on weather you had the start up issue all the time or just the first time in the mornings or after your car has been off for a while.

Thanks,

Ado

RambleJ · 10-30-2008, 02:18 PM

Im curious to hear myself, I also have been experiencing problems when I start my car, fortunately mine starts everytime, but i have noticed that at some starts if I have not started it for 4 hours or more the initial rev only hits 4 to 500. When other times its shoots up to around 1200-1500. Oh yah and now my Average gallons per Mile is stuck on 99.9 as well!

Tuned335i · 10-30-2008, 02:35 PM

A long start in the morning is the fuel pump failing to develop enough pressure. Once you have it started, the fuel system remains pressurized most of the day (the 6 hours you mentioned). If you leave it long enough, the pressure bleeds off and you experience the long crank again in the AM.

Everything I have read here indicates that the long crank is one of the first symtoms. The dealer can run a test and confirm the HPFP. There's a post of the SIB for the HPFP someplace on the forum. Keep in mind too that people have had the dealer run the test which passes, then had their HPFP fail a week later. The problem is that the failing pump performed adequately in the test to pass, but was still on the way out and failed several days later. So don't think that if your passes, that you're necessarily safe.

Ado · 10-30-2008, 03:14 PM

Thanks for the info bud.

Ado

elegant · 10-30-2008, 03:34 PM

Yes, hard starting is most often directly related to the HPFP. Please see related post today entitled April 08 FP (fuel pump).

Once my pump was replaced, starting is again instanteous, even after I was out of town for five days.

10-29-2008, 01:51 PM	#1
Ado King Kong 60 Rep 771 Posts Drives: E92 M3 Join Date: Nov 2006 Location: Toronto iTrader: (0)	Fuel Pump or Something Else I've read a tone of the fuel pump issues even from the beginning of the problem and was wondering if I'm having the same issue. I don't have any issues with car going into limp mode. This may be because I haven't been pushing the car in a while since it's really cold and tires don't stick. My issue is that every morning especially those mornings after the night before I pushed the car into maybe 6K RPM a few times. The car has a problem starting, sometimes I press the start button, hear it crank crank but no go. Then I stop it and press start again to get it to start up. Important : After I start it for the first time, I have no issues starting it after that for the rest of the day as long as the car hasn't been off for lets say 6 or so hours. To those that have had bad fuel pumps, did you also only have problems during the morning starts? Thanks, Ado __________________ 08 E92 M3 - AA ECU, AA Pulleys, AA Air Filter, AA Short Shifter - CURRENT E92 335i - Vishnu V3, Exhaust, Intake, BOV, CDV Delete - SOLD 1991 850i Dinan Twin Turbo - SOLD
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10-30-2008, 12:35 PM	#2
Ado King Kong 60 Rep 771 Posts Drives: E92 M3 Join Date: Nov 2006 Location: Toronto iTrader: (0)	lol I know many don't care about the issue anymore since it's been beat to the death after we've had so many issues with the fuel pumps. If any of those who have had fuel pump issues could at the very least comment on weather you had the start up issue all the time or just the first time in the mornings or after your car has been off for a while. Thanks, Ado __________________ 08 E92 M3 - AA ECU, AA Pulleys, AA Air Filter, AA Short Shifter - CURRENT E92 335i - Vishnu V3, Exhaust, Intake, BOV, CDV Delete - SOLD 1991 850i Dinan Twin Turbo - SOLD
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10-30-2008, 02:18 PM	#3
RambleJ Colonel 60 Rep 2,014 Posts Drives: F10 535i M-sport Join Date: Oct 2008 Location: Back in teh so cal iTrader: (2)	Im curious to hear myself, I also have been experiencing problems when I start my car, fortunately mine starts everytime, but i have noticed that at some starts if I have not started it for 4 hours or more the initial rev only hits 4 to 500. When other times its shoots up to around 1200-1500. Oh yah and now my Average gallons per Mile is stuck on 99.9 as well!
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10-30-2008, 02:35 PM	#4
Tuned335i Major 24 Rep 1,310 Posts Drives: E92 335i Join Date: Jun 2007 Location: World of Torque iTrader: (0)	A long start in the morning is the fuel pump failing to develop enough pressure. Once you have it started, the fuel system remains pressurized most of the day (the 6 hours you mentioned). If you leave it long enough, the pressure bleeds off and you experience the long crank again in the AM. Everything I have read here indicates that the long crank is one of the first symtoms. The dealer can run a test and confirm the HPFP. There's a post of the SIB for the HPFP someplace on the forum. Keep in mind too that people have had the dealer run the test which passes, then had their HPFP fail a week later. The problem is that the failing pump performed adequately in the test to pass, but was still on the way out and failed several days later. So don't think that if your passes, that you're necessarily safe.
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10-30-2008, 03:14 PM	#5
Ado King Kong 60 Rep 771 Posts Drives: E92 M3 Join Date: Nov 2006 Location: Toronto iTrader: (0)	Thanks for the info bud. Ado __________________ 08 E92 M3 - AA ECU, AA Pulleys, AA Air Filter, AA Short Shifter - CURRENT E92 335i - Vishnu V3, Exhaust, Intake, BOV, CDV Delete - SOLD 1991 850i Dinan Twin Turbo - SOLD
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10-30-2008, 03:34 PM	#6
elegant Love To Drive! 5 Rep 100 Posts Drives: 2011 335 M Sport E 92; '06 Z06 Join Date: May 2007 Location: Oregon iTrader: (2)	Yes, hard starting is most often directly related to the HPFP. Please see related post today entitled April 08 FP (fuel pump). Once my pump was replaced, starting is again instanteous, even after I was out of town for five days.
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