Thread: EFI Fuel Rail Pressure

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Do you have an exhaust leak causing O2 sensor to read lean and ecm then riching up the system??????????

Originally Posted by jerry clayton

Do you have an exhaust leak causing O2 sensor to read lean and ecm then riching up the system??????????

Nope. Not a bad idea, but not the problem. The issue is that it was doing great, then efficiency seemed to be going south, and then it was very obviously running fat. Problem is I can't say why.....