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p0171,p0174,p0300
vehicle came in with rough running condition. Hook up tech 2 and i have 3 dtc's. p0174,p0171, and p0300. Cylinder 3 is misfireing when off idle. Fueltrims are at idle: stft1 45% stft2 25%. both ltfts are 25%. Off idle: stft1 is up in the 20% area, and stft2 go... Login to read more. 
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19 Replies Received
19 Replies Received
| Engine | 6.0 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2003 Chevrolet Express 3500 6.0L
| Engine | 6.0 L |
| Trans | 4-speed Automatic (Electronic) |
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