- Oct 15, 2008
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Hey Guys,
If you saw my other thread I my car is bucking/missing with a power loss that comes and then all the sudden the power comes shooting back in at part throttle.
So I cleaned ALL sensors, cleaned all ground, searched for vacuum leaks (no luck there), change the EGR, TPS, PCV, new plugs, new wires, new cap and rotor and cleaned the IAC. I set the TPS to .98 now. The car runs sorta ok at part throttle before going open loop. The problem gets worse as the car comes up to operating temperature, then when it goes open loop it throws 91 and 41 (system lean left, system lean right).
The only thing I have not done is check the 02 sensor grounds (felt it was unlikely since the miss is there closed loops), replaced the fuel filter or replaced the fuel pump
Can a bad fuel pump and/or bad fuel filter cause the engine to throw lean codes and cause the car to buck/miss under part throttle at any RPM
Let me know,
Mike
If you saw my other thread I my car is bucking/missing with a power loss that comes and then all the sudden the power comes shooting back in at part throttle.
So I cleaned ALL sensors, cleaned all ground, searched for vacuum leaks (no luck there), change the EGR, TPS, PCV, new plugs, new wires, new cap and rotor and cleaned the IAC. I set the TPS to .98 now. The car runs sorta ok at part throttle before going open loop. The problem gets worse as the car comes up to operating temperature, then when it goes open loop it throws 91 and 41 (system lean left, system lean right).
The only thing I have not done is check the 02 sensor grounds (felt it was unlikely since the miss is there closed loops), replaced the fuel filter or replaced the fuel pump
Can a bad fuel pump and/or bad fuel filter cause the engine to throw lean codes and cause the car to buck/miss under part throttle at any RPM
Let me know,
Mike