93 corvette--poor idle/running rich/surging/bucking running out of ideas

[HellaciousA]

@GaryDoug

I opened my copy of the 1993 version of TTS Datamaster. In the "setup" screen there are options for:

- Y-Body Manual Trans

- Y-Body Auto Trans

- F-Body Manual Trans

- F-Body Auto Trans

If it works, I think it would be worthwhile for him to download your 1993 Datamaster File. That way when we can look at data we can have more confidence in.

What do you think of the fact that after the O2 sensors were switched side-to-side, the problem stayed on the driver's side? With a single wire O2 sensor, and the problem not being the sensor, what in the circuit would cause the voltage to hang at what may be the upper limit (1,132 mV) for 15 minutes of idle, then when the car was driven, slowly drift down to 350 mV and stay there?


@HellaciousA

When you say the problem remained on the driver's side, did you scan it and if so, did your driver's side O2 voltage show the same pattern described immediately above?

I didn't rescan--I just was able to see the cat glowing again and hear the exhaust popping, and the strong fuel smell. Given how inaccurate the data was with 9495scan, I didn't think there was a point. I used to have a copy of datamaster years ago, but I don't. If you guys have the setup file, I'd be happy to run that and do another data log.