Fuel Pressure

[Turkey Sammich]

What should the fuel pressure be at on a nearly stock 93 LX?

 

[BlownFiveLiter]

For some reason, 39lbs or so with the vacuum line disconnected rings a bell.

 

[Turkey Sammich]

Any reason it would decide to go from 39 down to 33?

 

[Flavadave4]

With the vac line off and the car at a warm idle it sould be around 39psi......do you have an adjustable regulator?

 

[Turkey Sammich]

I have a Paxton fuel pressure regulator with a Summit Fuel Pressure Gauge.

 

[91 HATCH]

I have a Paxton fuel pressure regulator with a Summit Fuel Pressure Gauge.

I WOULD TURN IT UP.YOUR PUMP MIGHT BE GETTING WEAK AND GIVING THE LOW PSI

 

[HISSIN50]

Above is correct (I think). 38-39 PSIG at simulated WOT (vac line off and capped). Once the vac line is reinstalled, a stockish cam will have you at 32-33 PSIG, though anything over 30 PSIG is within spec as I recall.

Good luck.

 

[donsbad68]

38-39 PSI with vacuum line off, along of blown stuff I tend to run 41-42 PSI