[534BC]

As I'm learning about scanners and these computer stuffs I think I may have narrowed it down a bit more. Someone chech me out and see if this makes sense.

As I take off with a cold engine it runs without missing a beat, I hold a constant speed (42-65 mph) and the very second it goes to "closed loop" is when it falls apart and starts mis-firing. I notice it is exactly as the converter locks up.

How does one tell when it is in closed loop without a scanner? This is new term for me. Can I force it to stay in open loop so I can drive it and verify that it is not missing in open loop?