injection pressure?
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Senior User
Joined: Mar 2004
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From: alberton pei
injection pressure?
I have shimmed my ipr up to between 70-80 psi and have done the 10k mod and keep getting the check engine light at 80kph and 2000rpm then the engine seems to defuel.I was wondering if the ipr is shimmed to high causing to much injection pressure thus making the light come on,anybody have any answers if this is not the cause iam going to install a regulator in my boost pressure line to map sensor and see if this works.Please reply. 
Postmaster
Joined: Jan 2004
Posts: 4,758
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From: colorado
your light could very well be from over boost especially if the engine seams to defuel. as far as the shimmed FPR, the general consences is (for best results) you should keep the fuel pressure at around 65 psi and you should not exceed 70psi, so you might try putting in a smaller shim
