what should the fuel pressure read on a 2004 chevy venture at the shrader valve port

Asked by Jun 03, 2015 at 09:38 PM about the 2004 Chevrolet Venture LS

Question type: Maintenance & Repair

I have a 2004 chevy venture van that has a code P0171(lean left bank system 10
code. i have replaced both o2 sensors and had chevy upper injection cleaner ran
through it. we cleaned the MAF sensor and cannot find any vacume leaks. We put a
fuel pressure gauge on it and it was 50lbs running and 40 when turned off. My brother
has a real nice SNAP ON scannere and it says my fuel trims are way outa wack.
really high trying to compensate for a lean mixture. Now we are being told its the fuel
pump, but before i change it i was wondering what the parameters are supposed to be
for this vehicle

2 Answers

286,815

Not sure on the fuel trim, but keep looking for that vacuum leak. Check all your hoses again. Did you do a smoke test?

never heard of a smoke test?

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