1997 Ford F150 automatic small V8. After warm up engine dies when in idle but drives fine until I stop. I have checked the vaccuum lines and cleaned mass air flow. The idle control is OK and I replaced all belt turned items. I had it checked at Advance auto on their machine and it said lean mixture. They have no idea what the problem could be. I replaced the EGR valve, pcv valve, and the coil pack. At one time their machine said catalytic convertor problem but that was several weeks ago and I used top engine cleaner and it cleared up.

Can anyone help?

 

I have the same problem with my 92 with V8.

I will be working on it today. If what I suspect is the problem, I will let you know.

By the way, when is the last time you changed your fuel filter?

 

The description sounds like the IAC, try the link below, you may find your answer there.


https://www.f150online.com/forums/en...e-problem.html