[macadamianut]

So,

Picked up from dealer today. They replaced the alternator and said that the car had stopped stalling for them.

They were not able to cure the poor running condition, hesitation/miss condition, which is actually worse now. They say they noticed that the wire to one of the crank sensors was cracked exposing the shielded core. Possibly causing interference. Could this be? Makes me think to check the wires to the MAF and other sensors too.

Their suggestion was to replace the engine wiring harness. That is a very big dollar job. They claim to have tested all the sensors and even tested cylinder compression.

They did not charge for the 2nd round, but time will tell if the car will stall again. If I had a warm garage to work in, I'd try lot's of things. For now its just throwing some more fuel system cleaner in it for s**ts and giggles.

The bad thing is that the car is missing/hesitating worse than before. Thinking of other ways to isolate this damn thing, will the engine run with a knock sensor unplugged? Or an 02 sensor unplugged? I know that it won't with the MAF disconnected.

I have always run 92 octane or 93 when I can find it and run fuel system cleaner every couple of months, so I wonder if it would be worth a trying to see if the problem gets worse with lower octane gas or the opposite and running an octane boost additive???

Thanks.