Fuel Pump??

[J-bird]

I've Searched all over for this.

Can a fuel pump have good pressure but not flow enough to support a stock engine. I have no idea if the pump is stock. I have 50 psi of pressure with the vacuum disconnected from the stock FPR, 45 psi at idle with vacuum connected, and over 60 psi at 12 lbs of boost.

The pressure looks too high to me for a stock FPR, and I'm having lots of knock retard even under under part throttle acceleration. Hopefully I'll get my tuning equipment hooked up this weekend.

Thanks,

Jeremy

 

[epix]

Re: Fuel Pump??

the stock fuel pump isn't too great, its in your best interest to upgrade to a Walbro 255

Have you done all the basic tune up stuff to your Typhoon?

 

[J-bird]

Re: Fuel Pump??

yea, all the small stuff is done. I am still working on the ic though. dam thing still dosen't seem to be pumping. I check the lines for kinks, and the pump is running. I'm thinking I need to burp the system real well.

I'm just wandering about the pump because the pressure is rock solid under boost. I would think that a failing pump would be loosing pressure on the top end or under boost?