SS#502

Can an OBDll controlled car run without Front O2 sensors hooked up, and will it mess up anything if you drive it that way? Long story short, replaced O2's with Bosch sensors and now after about 10 minutes it stumbles flat on its face and I lose my Tach signal but car still runs and surges, then comes back to normal about 20-30 seconds later... I tried searching with random answers, any other info would be greatly appreciated.

BALLSS

I believe without front 02's hooked up the car goes into open loop. it will run and throw CEL for the L&R Bank 1 02

I don't know if that affects tach signal, it doesn't on my car when I have purposely disconnected front 02's for other diagnostic purposes.

Best to use AC Delco AFS 75

SS#502

Cool, thanks!