CYLINDER 1 MISFIRE 1ON 1

2003 Ford Focus

Tiny

LIFEGOD1

March, 14, 2009 AT 8:58 PM

Engine Performance problem
2003 Ford Focus 4 cyl Front Wheel Drive Automatic 132999 miles

cHECK ENGINE LIGHT CAME ON AND DEALER SAYS IT WAS CYLINDER ONE MISFIRE.

FOUND 2889 RELATED QUESTIONS

Engine Miss

52 ANSWERS
12 IMAGES

1 Answer

Tiny

rasmataz

March, 14, 2009 AT 9:06 PM

Check no.1 cylinder's sparkplug/compression/injector

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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