for an easy first test I'd check the resistance of Temp Sensor II ..
especially warm.

is the throttle switch making contact at idle ?

scott
turbovans
On 11/13/2012 6:38 AM, Jim Felder wrote:
> Not that anyone has been following this, but my daughter let the engine get
> overheated on my 91 2.1 when the Temp II sensor retaining clip broke and
> immediately emptied coolant. The head gaskets leaked and the thermostat
> housing was warped, primarily, but I had some other troubles along the way
> like a cylinder frozen to one of the heads.
>
> Anyway, I made a mistake by letting a wire get caught under the driver side
> rubber gasket, which cases coolant to pool on top of the cylinder. I can
> take care of that. The engine, though, is exhibiting symptoms that I
> thought I would ask about.
>
> It was doing the same things before the overheating and gasket issues, so I
> anticipate some troubleshooting will be in order when I get the gasket leak
> repaired. Before I found the head gasket leak, I was able to run it to warm
> and then drive it for three or four miles, so I can observe that the post
> op problems are the same as the pre-op problems with the exception that the
> effects of the leaks, except for the mistake on the DS rubber gasket, are
> fixed.
>
> Here's what's going on: when I start the car, it runs great. It just purrs
> strongly and steadily, until it gets warmish and then it begins stumbling
> and issuing some black exhaust like it's running rich. If you let it idle,
> especially with it in drive and there's that little bit of extra drag, it
> will stall. It does the same thing with the O2 sensor plugged in or
> unplugged.
>
> Any ideas?
>
> Jim
>