1999 Explorer 4.OL SOHC idle-die issue
Greetings, its been a while since Ive been out her posting...
Ive got a 1999 Explorer Sport, 4.0L SOHC, automatic.. and for the past few months the starting has gotten progressively worse. It would crank and crank, but not fire. Once it would start, it would run fine. But once it was warmed up, it would struggled to restart.
At first I thought it was bad fuel, so I ran injector cleaner for a few tank fulls. It seemed to help for a little while, but then it continually got worse, even with the cleaner still in it.
A week ago I removed the old IAC, cleaned it heavily, reinstalled it, and it didnt make any difference.
Yesterday I installed a new IAC and it immediately made the start up better. But, after it idled for a few seconds, it immediately stalled. The only thing I didnt do when reinstalling the new IAC was put in the new gasket that came with it. I still have it, but the old one is stuck in pretty good.
This morning with it cold, it started fine, idled fine, and then I drove it to work. On the way there I came to a stop light, and it stalled on me.
Qs: Would a bad IAC gasket have it quickly die like that?
My list of possibilites is:
-intake manifold gaskets
After messing around with this for the past two months now, Im finally ready to take it to the shop to let them run diagnostics on it. The check engine light is not on. btw: when running with constant gas on the highway it runs fine. By changing out the IAC, I suspect all Ive done is make the problem worse, or mask whatever it is...
Any input would be appreciated.