ENGINE MISFIRE

2002 International Truck

Tiny

brian guido

March, 5, 2011 AT 4:31 PM

I have a 2002 international 4300 dt 466 bobtail with black smoke coming from exhaust, have allready changed pistons, injectors, harness, and still have #1 injector not firing.

FOUND 2123 RELATED QUESTIONS

Mis Fire -

17 ANSWERS
11 IMAGES

1 Answer

Tiny

rasmataz

March, 6, 2011 AT 4:05 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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