Fuel pressure drops/Please help!

Brett88lx · Oct 23, 2006

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Excuse me for the ignorance but I have a question.

I have a 302 w/ GT40P's, B303, rockers, Mass air and 24lb's.

1.) What should my fuel pressure be at?

and

2.) Is my fuel pressure supposed to drop(guage) after I shut the car off or is it supposed to stay where it's at on the guage?

Thanks in advance for any responses/advice.

04sleeper · Oct 23, 2006

I wouldn't call it ignorance. Just a simple question.

Set your fuel pressure to 38 PSIG with the vacuum line disconected from the FPR.

As far as the drop goes, it is normal. I have seen some that stay and some that drop. It is usually due to the fuel pump check valve not working properly, but should not cause the car to run bad or anything.

As long as you have steady fuel pressure when running is all that matters.

Brett88lx · Oct 23, 2006

04sleeper said:
I wouldn't call it ignorance. Just a simple question.

Set your fuel pressure to 38 PSIG with the vacuum line disconected from the FPR.

As far as the drop goes, it is normal. I have seen some that stay and some that drop. It is usually due to the fuel pump check valve not working properly, but should not cause the car to run bad or anything.

As long as you have steady fuel pressure when running is all that matters.

Thank you so much for your help. I'll set it to 38 and see what happens.

But why do I have to disconnect the vacuum?

Flavadave4 · Oct 23, 2006

You just have to pull the vacuum line off the face of the regulator, with that off you should set it somewhere between 38-40.

Fuel pressure drops/Please help!

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Fuel pressure drops/Please help!

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