I think I have exhausted all options and would appreciate any other thoughts.

My 98 xj will idle very rough when it is cold. Almost dies, then once it warms up, idles & drives great.

Also, once it warms up, if I shut it off, after 15 mins, it will start the first time, die, and crank but not start til it cools down a bit.

The other day, it was warm, and idling for about 3-4 mins. Began to stall, and was about to die, when I opened the hood, and in about a minute, it began to idle smooth again.

I have changed the CPS, TPS, Coil, seafoamed, checked the IAC, checked fuel pressure, checked plugs, cleaned the TB, shielded injector #3...

I'm thinking maybe I have a faulty CPS.

Any other thoughts guys?

 

Mine dose the same thing ever since I sunk it.
No clue what it is

 

Did you clean the IAC or just check it

 

I checked it, and it was super clean. Looked new.

 

How do you get around? Wait til it cools before driving it again?

 

How about a vacuum leak???

 

It is not common, but the "camshaft position sensor" inside of the distributor can suffer from thermal (heat related) failure.

 

I just keep starting it and hit the gas to keep the Rpms up then it will go back to normal

 

Ok, I will try that next.

Anything that could be immediately affected by the cool air once I opened the hood? I thought that was odd and was able to replicate the same stalling/fix several times.

Mine will not even let me do that. Once it starts idling rough, I can floor it, and it will not make any difference. Just sputter and die.

 

Bump for any other advice before I take to mechanic shop.

 

ever figure out what it was, mine is still doing it?