What causes miss firing and black smoke in Mitsubishi Galant 98 model when on idling. And when airflow sensor is removed its OK.
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Asked by Kevo2013 Nov 30, 2013 at 11:13 PM about the 1998 Mitsubishi Galant

Question type: General

10 Answers
199,805

dandyoun answered 10 years ago

Black smoke is un burnt fuel. Which motor do you have?

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199,805

dandyoun answered 10 years ago

Which engine is in it? The 2.0L DOHC or the 2.4L SOHC?

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199,805

dandyoun answered 10 years ago

I would try cleaning the air flow sensor. When you say removed -- do you mean taking it off or just unplugging it from wiring harness? Also check and clean air filter.

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dandyoun answered 10 years ago

Oh ok. That leads me to think that the sensor either needs cleaning or to be replaced. I would try cleaning first. Only use cleaner for that type sensor and make sure that you don't touch any parts of the sensor with your hands.

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Kevo2013 answered 10 years ago

I have replaced more than 3 sensors,replaced the GDI pump,replaced the fuel pump as well as the plugs. Now I am to check my ECU

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Kevo2013 answered 10 years ago

Thank you very much. I will try that and get back to you on Monday. Nice day

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