SMOKING BLACK SMOKE

1999 Chevrolet Silverado

Tiny

rocky443

January, 26, 2011 AT 8:29 PM

1999 chevy 4.3 truck starts up cold but if you give it a little gas its missing and smoking runs great after warm up I have changed fuel pump cts sensor complete tune up fuel injector cleaner and map sensor and I did a computer analysis and shows no code

FOUND 740 RELATED QUESTIONS

Black Smoke Coming From Exhaust

65 ANSWERS
100 IMAGES

Smoking

32 ANSWERS
48 IMAGES

1 Answer

Tiny

rasmataz

January, 27, 2011 AT 7:18 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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