Primary fuel pump failed while on road trip - please advise
#17
Rennlist Member
Man, What's going on.... you're the 3rd person with a Gen 1 Cayenne this month with this Fuel Filter/Pump issue. I wonder what's taking out these Filters/fuel pumps. Is it the gas? How many miles does folks have on their PIG with this issue. Please tell.
#18
Rennlist Member
Thread Starter
I have a 114k. I use name brand gas 99% of the time. Ironically, I had filled up at arco right before I left. I just can't blame the gas though... my ML ate two fuel pumps at 130k.. one right after the other.
#19
Drifting
The pumps on my 05 CTT also failed somewhere in the region of 110k miles.
#20
Race Director
Don't know if this makes anyone feel better or not but it wasn't that long ago that BMW had major issues with their HP Fuel Pumps on the _35's, some were reporting 3 and 4 pump replacements in less than 50k mi.
However BMW stepped up and announced they would warranty cover the HPFP's for 100k mi. IIRC.
However BMW stepped up and announced they would warranty cover the HPFP's for 100k mi. IIRC.
#22
Rennlist Member
I can tell you one reason for the failures are the temprature of the pumps. The get cooled by the fuel arround. If you drive your car always until the last drop there is no cooling anymore and thats not good for this sensitive part.
#23
Rennlist Member
Thread Starter
Yeah thats a good point. Interesting too because lately I had been running the tank lower than usual before top offs. I'm going to make sure to keep the fuel levels higher from now on.
#24
Rennlist Member
Makes sense, I just pickup my 04 CS and I'm hearing the starter grind intermittently, I'm hoping it's not a sign the Fuel pump is going out or possibly the starter going. I purchased the CS from my friend not sure if he ran the tank down to the last drop. I'll make sure I refuel the tank no less than a .25 tank. I'll keep my fingers crossed.
#25
Rennlist Member
Thread Starter
Starter grinding is not the sign of a bad fuel pump IMO. A rough idle and a stuttering on acceleration with flat spots especially at low rpms is. Also my MPG readout on the display had been showing worse gas mileage for a couple weeks. I bet that was an early sign because the pump wasnt metering properly or something and throwing the computer off. A grinding starter though may indicate that the coolant pipes are or have leaked in the past.
#27
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Starter grinding is not the sign of a bad fuel pump IMO. A rough idle and a stuttering on acceleration with flat spots especially at low rpms is. Also my MPG readout on the display had been showing worse gas mileage for a couple weeks. I bet that was an early sign because the pump wasnt metering properly or something and throwing the computer off. A grinding starter though may indicate that the coolant pipes are or have leaked in the past.
BTDT - was a bad check valve in the fuel filter (found by CPO funded process of elimination - new fuel pumps, new pressure regulator, new fuel filter finally fixed it.)