When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
PLEASE take a look at this HPFP log at cold startup on my 08 turbo. Takes over a second to crank. Is this a HPFP issue? Battery seems fine. If HPFP issue could someone help me out with a part #? I think it's 948110315GX but not sure. THANKS!
Note: No codes were thrown according to my Durametric. I've had my battery load tested and it passed with flying colors.
Looking at the Durametric numbers (a plot of the two columns might be illuminating..) it appears it takes roughly 1 second for the pump to achieve the set-point. That might cause a small delay in starting - but I imagine the injectors would still fire even at the starting pressure of 22 bar (~330psi.) but it might run a tad lean. How long is the delay in starting? 1 second seems normal to me..
Looking at the Durametric numbers (a plot of the two columns might be illuminating..) it appears it takes roughly 1 second for the pump to achieve the set-point. That might cause a small delay in starting - but I imagine the injectors would still fire even at the starting pressure of 22 bar (~330psi.) but it might run a tad lean. How long is the delay in starting? 1 second seems normal to me..
The delay was about 1 second then. The delay is longer the longer the car has sat since it last ran.
Update - this is NOT the right part #. That part # is for the Cayenne S, not the Cayenne turbo. The correct part for the turbo is 9481103154X. This superseded part 00004330141001.
Are you sure this is really this issue and not a symptom of another more critical timing item such as a worn or failing starter motor? If you starter takes a second or two to begin to spool you would see this as well, right?
I changed out my starter the last time I had my intake plenum off and its night and day difference in terms of speed and responsiveness. My original would have a two second pause after turning the key before anything and I mean anything would happen.
After having my HPFP replaced last week, the start times were also drastically different. If your HPFP is failing it will try to start for seconds. It's almost immediate with the new pump even after a night in 15* New Englad weather.
Are you sure this is really this issue and not a symptom of another more critical timing item such as a worn or failing starter motor? If you starter takes a second or two to begin to spool you would see this as well, right?
I changed out my starter the last time I had my intake plenum off and its night and day difference in terms of speed and responsiveness. My original would have a two second pause after turning the key before anything and I mean anything would happen.
Just my .02
When I turn the key the starter kicks on immediately... it's just a few seconds before the engine cranks.
Originally Posted by MR Turco
After having my HPFP replaced last week, the start times were also drastically different. If your HPFP is failing it will try to start for seconds. It's almost immediate with the new pump even after a night in 15* New Englad weather.
02-03-2018, 10:51 AM
Please help - possible HPFP issue on 08 turbo
