Rough Idle Cold

CONDITION
^ Rough Idle Cold

POSSIBLE SOURCE
^ EGR valve malfunction.
- Run quick test.

^ EGR flange gasket leaking.
- Replace flange gasket and tighten valve attaching nuts or bolts to specification.

^ EGR valve attaching nuts or bolts loose or missing.
- Replace flange gasket and tighten valve attaching nuts or bolts to specification.

^ Vacuum leak at EVP sensor.
- Replace O-ring seal and tighten EVP sensor attaching nuts or bolts to specification.

^ EVR solenoid malfunction.
- Run quick test.

^ EGR valve contamination.
- Clean EGR valve.