I own a 93' F150 5.0 V8 Automatic with 2WD.
After I owned it of a day I thought I have to
clean it once real nice so I washed the engine.
What happens now is that idle is way to high
and does not regulate itself down.
You can drive it but it's annoying standing on the brakes
all the time.
Right after cleaning I unplugged most plugs and blew them
dry with the air gun also the distributed cap but no changes.
I've searched around here and guys wrote it can be the
IAC and a TPS but what is that??
Pulling codes is not easy here in germany no tool.
But iīve read you can build a tool with a multimeter.
Checked the view vacuum lines but nothing really to see.
Anybody else any idea?
What exactly is iac and tps???