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P1171 Diagnostic Trouble Code Discussion for March 2009

Fuel System Lean During Acceleration

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Trouble Ticket Help Requests for DTC P1171
Help Request Posted
2000 Pontiac Grand Am SE 2.4L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G2NF52T1Y
P1171: Fuel System Lean During Acceleration. Vehicle came in with MIL on P1171, P0300. Would misfire at idle no response on acceleration. I replaced fuel filter due to it being plugged up. Vehicle still has misfire. Fuel trim levels at idle do not go more than 10%-+. Idle Vacuum is about 16Hg. When you d...
March 13, 2009