High Idle on '88 Cherokee
 

My '88 Cherokee has a problem with what feels like a stuck choke, except
that its fuel injection. When I start it, the RPMs go to about 2000,
then, instead of falling to something more reasable, they continue to rise
to maybe 2500. After a few minutes, I can shut it off and it'll then
climb to 2000, and drop back to 500-800, and often stall unless I feather
the gas a bit. After a minute or so it'll even out. Other times when I
start it, it behaves just fine. It seems to be temperature related.

I was thinking that maybe a sensor is bad. I unplugged the cold start
injector but the RPMs didn't decrease.

Any help would be appreaciated.

Thanks.
-bob-