Rough idling, jumping RPM how to fix?

Kimpoy

Member
1.5L Auto.

Car accelerates fine, but not while idling, especially on gear. At worst, Car almost feels like gasping for air and chasing RPM up and down.

Checked distributor cap, ignition leads, spark plugs and vacuum leaks. They're all fine.

I Have emptied a can of TB cleaner on the TB, set the TPS, and cleaned the IAC.

Cleaning the IAC seemed to help a lot, the RPM jumping has stopped, but the car idle still doesn't feel right. I only cleaned the actuator part that held on to the TB with 2, 8mm bolts. Videos I've seen on youtube, for other cars like toyota you can clearly see the spring near the motor that can be cleaned easily, but not on Lancer I guess. Any idea what to do?
 
Fuel filter bad ? Correct spark plug gap? Maybe it's an 02 ? Engine light? Hole in exhaust? Bad cat? Timing?

I dunno you did alot of right things there, I have a manual so I don't know if it's an auto thing.
 
I have similar issues-Replaced the spark plugs, cleaned throttle body valve, cleaned the mass air flow sensor- has improved a little...
Planning to replace fuel filter...Hope after that would work better
 
Back
Top