Hi nmcafee, Welcome to 2carpros and TY for the donation
Could be caused by the following:
Probable causes of an engine running rich are as follows:
1. Excessive fuel pressure can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
SPONSORED LINKS
Thursday, August 19th, 2010 AT 5:55 PM