Chevy Silverado

20

Asked by Jan 15, 2019 at 07:23 PM about the 2007 Chevrolet Silverado 1500 1LT Extended Cab 4WD

Question type: Maintenance & Repair

hello, I really need someones help. I have a 2007 silverado 4.3 and its not
running so good, that I mean it kicks from 1st to second... revs high but not
really high. and I can't get rid of the p0174 p0171 codes which is bank 1 and
bank 2 running lean. I've replaced the MAF, Intake manifold, TPS sensor, MAP
sensor, and other little things.

3 Answers

20

Im sorry its a 4.8 not a 4.3

1 people found this helpful.
116,925

Is your exhaust system leaking? A leaking exhaust system can pull fresh air into the exhaust system and cause a false lean condition. Hope that helps! Jim

20

there isnt any ticking coming from anywhere though. I'm gonna try and do a diy smoke test but I had the gaskets professionally done.

1 people found this helpful.

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