Crazy Eddie

BTW I don't know if I mentioned this ( I believe I must have in the earlier thread ) The only way I was able to determine that the issue may be with the boxes ( the KLR or DME ) was, I had them out on the floor of the passenger side foot well, and preceded to move them a little when the car was idling. I noticed that there was a change in idle sound, and fuel ratio ( on my ZT2)
At first I was really looking for a loose wire, after all the wiring I did for the SMT6 and all the other stuff I added. But I was convinced that I didn't have loose wires, because I was so freakin' methodical as to how I spliced them ( all soldered and then liquid taped and them heat shrink wrapped and then wrapped with that friction tape like the factory.)
Just for the heck of it I would consider pulling out your boxes, and see if moving them a little while the car is idling does anything ???
Regards
Ed

blade7

Yes I think this is where I'm heading. I don't know if it has any bearing but the battery is 7+ years old, I haven't replaced it because despite limited use the car always starts from cold.

blade7

I've driven the car a few times since the issue and while it hasn't cut out I've noticed a couple of times after stopping and restarting the AFR has gone rich for a couple of minutes and the car stumbled before running normally. Not sure if that's over fueling or weak sparks ?

Crazy Eddie

Mine had an unstable AFR as well, it would bounce back and forth.
It turned out to be the KLR weak solder joints on the board ....
Regards
Ed

blade7

Thanks Ed.

Crazy Eddie

Good luck