Fuel filter causing fp decrease?

[oldman420]

fp at 30psi with vacuum, time for a new filter?

just bought 255, afpr, and injectors btw

 

[assault187]

check the fuel pressure while pinching or removing and plugging the vacuum line going to the FPR

 

[FORMONTOYA]

A couple of stupid questions since your question is rather vague....

1. Did this just happen over time?
2. At some point after the mentioned install, was the FP at 37-38PSI with the hose OFF?
3. What vacuum are you running at idle?


If you are running 37-38PSI with the hose OFF, once you put the hose back on the FP will decrease 1PSI for every 2inHg (roughly). So if you are running roughly 16-18inHg at idle then with the hose on you should see roughly 29-30PSI with the hose ON.

 

[oldman420]

thanks formontoya i will definately go home and give it a pinch