I’m not the right guy for this thread, so I’m gonna bow out and let some other members help you. Best of luck.

George

 

You're right, I'll figure it out myself. Thanks anyways.

 

The fuel pressure requirements of these vehicles is pretty exacting and requires specific testing to determine whether it is within specification or not. What has been attempted to be communicated thus far is that testing will confirm where the problem lies. Gauges are needed to tell the difference between the 60psi that is required and the 55psi that would be problematic for the poppet nozzle SCFI setup that was originally in the 98 thru mid-02 s-series trucks as well as when looking for leak-down results. Also, I can only assume we are discussing a range of vehicle years here since the vehicle has not been mentioned yet...

Since it was brought up, --> Sticky HOW TO: Check regulated fuel pressure, pump max output, & leakdown

And an apropos quote from the sticky: