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Discussion Starter #1
Is is on that release valve on the fuel rail? Do I check it with the car running or off?

What should it read if I have a 190 fuel pump and 30# injectors?
 

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Newbie
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5,650 Posts
Yes you check if from the schrader valve on the fuel rail. If your FPR is stock, you should have ~40 psi with no vacuum to the regulator and around 32 with vacuum. You can check it with the car running for these values, or if you prime the fuel rails and test for pressure you can see how much it builds up to and how long it holds, which can help tell you if the FPR or fuel pump is bleeding off pressure.
 

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AED Specialist
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1,277 Posts
More importantly...

Grasshopper,

With the blower and no fmu you should have 1-psi additional of fuel pressure for each psi of boost pressure. So if you have 6-psi of boost, at WOT you should see 46-psi of fuel pressure.

As long as fuel pressure does not drop off at WOT you will be fine. You really need to check it at WOT to be sure. If Fuel pressure drops off but Boost does not, then you have a serious problem.

A-Train
 
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