P1171 Diagnostic Trouble Code Discussion for June 2019
Fuel System Lean During Acceleration
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| Help Request | Posted | |
| 2012 GMC Sierra 1500 SLE 5.3L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 3GTP2VE74C P1171: fuel trim lean B1. This truck came in w/multiple misfire on odd cylinders ONLY . Removed spark plugs to find odd plugs black from rich mixture on odd side only . Even bank is good . I could run a bunch of tests but it is doing this on one bank only . The plugs look just ... |
June 01, 2019 |
