bimmerjeeper
NAXJA Forum User
- Location
- USA
For the new guys, can we make a list of all the things that can cause a bad idle?
I'll try to start the initial list. Can you rank them in proper order?
I'll try to start the initial list. Can you rank them in proper order?
- TPS (Throttle Position Sensor)
- Idle Air Control (IAC) motor
- Vacuum leak
- MAP sensor?
- Bad battery (effects ECU)
- Clean Throttle Body? (getting stuck?)
- CPS (Crank)
- Cam PS / Distributor Pickup Switch
- Distributor cap, rotor, wires, plugs
- Low fuel pressure?
- Bad alternator ?
- O2 sensors (should throw code)
- Bad injector?
- Replace coil?
- Intake Manifold Vacuum leak?
- EGR valve?
- CCV hoses clogged?
- Fuel filter?
- Air Temperature Sensor?
- Coolant Temp. Sensor