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