QUESTIONS FOR ALL CARS MIS FIRING

2002 All Other Makes All Other Models

Tiny

mariam12uk

July, 17, 2009 AT 10:29 PM

Engine Mechanical problem
2002 Questions for all other cars 6 cyl Two Wheel Drive Automatic 71000 miles

hi I have a smart fortwo. It is misfiring from 2 month now I have changed the coil pack 3 times. Put all new as well but no use. It is vibrating and I dont know what to do. Pls help

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Engine Miss

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Tiny

rasmataz

July, 17, 2009 AT 10:41 PM

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

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