Ranger idels rough on startup.. - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

rusty reel · 06-03-2006, 16:00

Need some advice..

I have a 94 Ford Ranger that is idle rough at start-up. It only does it when the truck has been turned off for several hours, mainly overnight. When I start it in the morning the RPMs jump to about 2500 and then immediately drop back to 500ish, and the engine almost chokes out. It does this two or three times and then it idles back to normal RPMs. I was thinking maybe this could be caused by the Idle Air Control valve or the Throttle Position Sensor. Anybody have any advice or suggestion.

Rusty Reel

Aussiblue · 06-03-2006, 20:26

Lots of possibbles but a simple one often overlooked and a good starting point is a clogged air filter.

rusty reel · 06-06-2006, 16:00

Thanks for the advice. Checked the air filter and it was fine as I expected. I think it has turned out to be the IAC. Took the IAC apart and gave it a good wd40 bath and things seem to be back to normal.

Thanks

RR