cHECK ENGINE LIGHT CAME ON AND DEALER SAYS IT WAS CYLINDER ONE MISFIRE.
Mar 14, 2009 at 8:58 PM
2003 Ford Focus CYLINDER 1 MISFIRE 1ON 1
2003 FORD FOCUS
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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.
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.
Mar 14, 2009 at 9:06 PM
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