The car has a slight black smoke from the exhuast pipe what could be the cause.

Tiny
THANDO
  • MEMBER
  • 1999 TOYOTA TAZZ
  • 160,000 MILES
This is a 1300 tazz 1999 model and has just been change a new cluctch kit
Friday, September 2nd, 2011 AT 8:09 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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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Friday, September 2nd, 2011 AT 10:39 AM

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Black smoke being produced from the exhaust system of is a sign of too much fuel being processed by the engine.

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