[Paul_NO]

My wife's '90 Ranger (2.9 V6 EFI) is barely ldling at +/- 400rpm. It has been steadily decreasing over the last year or so. It quit having a fast idle when starting cold. All I could find is that the Throttle Position Sensor may be bad. Has anyone run into this or had the TPS go bad?

 

[Guest]

its most likely the TPS or IAC, although i dono how to test them.

 

[Paul_NO]

IAC ?

IAC? Is that the air bypass valve?

 

[Guest]

Its the idle air control valve, looks like a film canister on the pass side of the upper intake

 

[Paul_NO]

IAC...

thanks, that is called the Air Bypass Valve on my Bronco, IAC on the Ranger. I'll check it out.