I HAVE A DUALLY 4X4 PICK UP TRUCK WHEN IN PARK IT WANTS TO SUGERS ON ME AND SHOOT BLACK SMOKE.

2000 GMC C3500

Tiny

troy nevills

December, 8, 2011 AT 1:26 AM

I wants take of foot have to be on brake

FOUND 735 RELATED QUESTIONS

Black Smoke Coming From Exhaust

65 ANSWERS
100 IMAGES

Smoking

32 ANSWERS
48 IMAGES

2 Answers

Tiny

ASEMaster6371

December, 8, 2011 AT 1:35 AM

May be a vacuum leak or a bad mass air flow. Have it checked for codes and see what comes up.

Roy

Tiny

rasmataz

December, 8, 2011 AT 1:39 AM

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.

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