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My fuel pressure??

   
Old Apr 16, 2008 | 04:07 PM
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My fuel pressure??
I just checked my fuel pressure and it's at 40psi at idle is this ok
2006 evo_9 THANKS,,,,
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Old Apr 16, 2008 | 04:23 PM
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Vacuum hose connected or disconnected from the FPR?

With the vacuum hose disconnected, you should be 43.5 psi +/- 1.5 psi.
Last edited by l2r99gst; Apr 16, 2008 at 04:28 PM.
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Old Apr 16, 2008 | 04:29 PM
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That is a must, that way you can get a solid number.
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Old Apr 16, 2008 | 04:38 PM
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vacuum hose disconnected from FPR 45psi vacuum hose on 40psi...
THANKS,,,,,,sO Am I ok,.
Originally Posted by l2r99gst
Vacuum hose connected or disconnected from the FPR?

With the vacuum hose disconnected, you should be 43.5 psi +/- 1.5 psi.
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Old Apr 16, 2008 | 04:45 PM
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You're fine. It's at the top of the spec, but I'm guessing that you are on the stock fpr and have an aftermarket fuel pump like a Walbro? It may be causing it to be on the high side of the spec, but yes, you are fine.
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