|
|
05-10-2011
Hey guys. I have the ZZP fuel logs with my setup, and if I turn the key to the 'on' position, my fuel pump will prime to about 40 psi, then slowly goes down to 0 (takes about 2 minutes). I'm assuming the fuel pressure regulator is bad? I'm not sure though. I'm not too experienced with troubleshooting fueling issues.
05-10-2011
Could be the regulator or the pump. Possibly even a leak somewhere... See or smell any fuel in the engine bay or under the car?
05-10-2011
Never noticed a fuel smell in the engine bay or around the car. Hmmm.Originally Posted by DanGTP
05-10-2011
Might be worth checking out. I've seen leaking fuel filter connections before that go un-noticed because the smell is not present unless you crouch down near the filter area after the car has been run. The o-ring in the receiver part of the fuel line where the quick-connect end of the filter goes in can go bad and leak.
05-11-2011
Got under it. Can't smell any gas or see any leak.
05-12-2011
Pump may be going, then.
05-12-2011
Damn. I just replaced the stupid the pump like less than a year ago. Gahhhh! Thanks for your help man.
05-12-2011
I'd lean towards the FPR.
Take the vacuum line and if it smells like gas, FPR.
To be 100% get a vacuum tester and apply 20 in Hg to it and see if gas comes out.
05-12-2011
There is a check valve built into our pumps. When teh check valve is bad, pressure bleeds down. It's very common for these to be bad and yet the vehicle to be fine this way.
Beyond a pressure test, is the car acting funny? What is pressure at idle and WOT?
FWIW I've seen cars pass the key click pressure test (GM FSM) and yet..have trouble running at WOT. Put the gauge with a long hose on it and as soon as the throttle gets opened, the pump can't keep up. With the windows down I was screaming at my buddy "Scotty... let off the throttle we are going to go flame out!" Pressure was down to 7psi.
05-12-2011
Good info, Bill.
05-12-2011
I emailed ZZP and asked them about it. Hopefully they help me out.
Does this require a new pump?
05-12-2011
If the car runs normally and you don't loose pressure under load, I'd guess you're okay for now on the pump. If your pressure starts dropping off under boost, it might be time to replace it again (maybe with a Walbro this time).
05-12-2011
Personally I can't spend the money on a Racetronix or Walbro after pickup up TREPerformance.com's high flow pump for my Bonne, a regular one for my truck and knowing a bunch of other guys running these pumps without any issues (less the one posted this week here. Still not sure if that's the pump or something else).
05-12-2011
Normal! does it maintain pressure while running? the aftermarket FPR they use bleeds off the pressure this is why ZZP recommends turning the car to the on position and waiting 4 sec before cranking it when you use logs
Last edited by 01gpgt01; 05-12-2011 at 10:57 AM.
http://www.streetfire.net/video/2001...ynp_208097.htm
05-12-2011
WOW that's a great price on a 255lph pump! I'm looking for an upgrade, so this may be my next purchase.
05-12-2011
Also on the 97-00 gtp pump they come with a new venturi feed line and new heat sink/pump holder cover thing. The prj kit does not come with one and the used pump cover was a ***** to get off and then back on to the new and wider walbro. I ended up using a lot of vaseline and it still split the cover, but it will still hold it in place.
05-12-2011
That's what I said when I did it. I originally figured if it was crap then I wouldn't be upset. Meanwhile I've found out there's a bunch of GP/Regal guys using them for pumps with great results also.
05-12-2011
Really? It maintains pressure around 35-40 psi while idling.
05-12-2011
That's a touch low. You'd ideally want 42-48 idling. 55-60 with the fpr vac line pulled
05-12-2011
Yes, Bump pressure up to 48. Your fine. Snap the throttle and make sure the pressure snaps up and down with throttle. Sounds fine to me
http://www.streetfire.net/video/2001...ynp_208097.htm
| « Previous Thread | Next Thread » |
| Tags for this Thread |
| Bookmarks |
Bookmarks |
