Terrenc

2002 F150 ONLY blows thru defrost, but very cold. Lately when I switch from park to drive, from drive to reverse, and/or from reverse to drive the RPMs go up and down (almost dies but doesn't). When I put it into park it just dies without RPMs changing. At one time it ran great until I opened the door or rolled down a window, then it would want to die. This started a few years ago and only ran rough during cold mornings, stalling a few times at a red light or in traffic,,, now it's always running rough while stopped and will stall 10 seconds after I put the truck in Park.

Yes I put the defrost part even though there are many threads about it, but my truck is also stalling.

I've changed the intake manifold and replaced the O-Ring on the EATC.