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Re: Idling High/Dieseling at shut off/accelerates on it's own/too much fuel
there are only two ways a EFI car can truely run-on after shut off. a leaking injectior or a bad fuel pressure regulator. a leaking injectior you may be able to visually see the injectior contining to spray/drip fuel after shut off. a bad fuel pressure regulator(by which i mean the rubber diaphram inside the FPR is leaking) can leak fuel into the vaccum line connecting it to the throttle body, basicly acting like a extra injectior that is always on. if you pull the line off of the FPR and it spits fuel out at ya, its safe to say the diaphram is busted
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Daily driver: 1995 Buick Regal Custom 3.8L 4T60-E 150K miles
Gone: 1994 Saturn SL2 1.9L MP3 168,666 miles
EPA 608 Universal Certification
EPA 609 Certification
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