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how would an engine run if it has a bad oxygen sensor
Posted: Tue Mar 02, 2004 5:22 pm
by TurboLegacy
my engine lags after a semi-hard run, it is sometimes hard to keep moving. i think it is running lean. i checked the plugs and they are clean. When i step on the gas the rpms dont go up, instead they go down. could this be the injectors or a problem with the O2 sensor? this problem only started after i had my bypass venting to the atmos. because it was venting, it caused it to run rich, what would have been messed up by the richness?
Posted: Tue Mar 02, 2004 5:32 pm
by vrg3
First question - did you reset the ECU after fixing the bypass valve? You should, to clear the fuel trims.
Running too rich can foul up the oxygen sensor.
You might want to try just unplugging your oxygen sensor, resetting the ECU, and seeing how it runs without the sensor.
resetting the ecu?
Posted: Tue Mar 02, 2004 5:57 pm
by TurboLegacy
how do i reset the ecu in my car. do i do this with a scan tool?, if not where, and how much? thanks
Posted: Tue Mar 02, 2004 5:57 pm
by THAWA
pull the batt for 30mins+
Posted: Tue Mar 02, 2004 6:06 pm
by vrg3
I just disconnect the negative battery terminal and press the brake pedal for 30 seconds. It's never failed for me on a Legacy turbo.