- Oct 15, 2020
- Reaction score
- New York
- Vehicle Year
- Make / Model
- Ford Ranger
I took off the IAC and it didn’t look bad inside, but I gave it a good clean and tested the solenoid which works properly.Your throttle is all the way closed, a high idle indicates a vacuum leak somewhere past the throttle plate like vacuum lines, brake booster, intake manifold gaskets, broken EGR valve, etc...
That is unless the IAC valve is gummy and stuck open, that would do it...
I will look for a vacuum diagram for this truck and get to work.
I’m not sure what I should do about the throttle adjustment screw in the mean time. It’s one turn more retracted than it was as I got the truck, and it meets perfectly with the pate lowering back down closed. For now I’ll just keep it how I have it since the RPMs are lower but I anticipate ill want to assess fully this later, if it’s possible to get my hands on some adjustment information for it ..