I drive a '98 Ford Ranger 2.5L 4banger 2wd with 82K miles. Last week it started running rough and fluxuating RPM's on cold start up. It does this whenever I first start the truck for the day. After a minute of idling, it smoothes out and the truck runs fine. FWIW, last year, I put new Bosch plugs, wires, fuel filter and PCV valve.
I tried cleaning the IAC and TB with some carb cleaner and a small parts brush. Both did nothing for how the truck starts up, still the same in all ways.
I'm starting to think my TPS sensor is going out. There is no check engine light and I've learned that this is a common problem on some Rangers.
My question is how do you properly test the TPS? I do have DMM but no other testing equipment. Any advice or imput anyone has, I would appreciate. Thanks again -op-
have the same problem?
Thursday, March 30th, 2006 AT 9:06 PM