Misfire at no.6 check the sparkplug and compression for this cylinder-
Probable causes of an engine running rich are as follows:
1. Excessive fuel pressure can be cause by restricted fuel return line
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system
Thursday, October 27th, 2011 AT 7:56 PM