OlyJeep
NAXJA Forum User
- Location
- Owosso, MI
Hello. My '95 4.0L recently developed an erratic idle when warm and cold. Using my Haynes Manual and a multi-meter, I tested all of the sensors and discovered a faulty O2. All other sensors tested ok. I also cleaned the IAC and throttle body. The problem was solved after installing the new O2.
Now I'm having a new problem. Upon cold starting, the idle is perfect and it runs great while in Park. However, as soon as I shift into gear, the engine stumbles for a few seconds. It doesn't quite stall and runs fine at higher RPMs. It only happens during cold startup and runs great otherwise. There is no "check engine" light and no trouble codes. WTF? Any thoughts or ideas? Thanks.
OlyJeep
Now I'm having a new problem. Upon cold starting, the idle is perfect and it runs great while in Park. However, as soon as I shift into gear, the engine stumbles for a few seconds. It doesn't quite stall and runs fine at higher RPMs. It only happens during cold startup and runs great otherwise. There is no "check engine" light and no trouble codes. WTF? Any thoughts or ideas? Thanks.
OlyJeep