• Tiny
  • john mothersell
  • 1997 Ford Expedition

Engine Performance problem
1997 Ford Expedition V8 Four Wheel Drive Automatic

i have a misfire in cylinder 4, the spark plug wire is getting spark to the spark plug and the fuel injector is working like it should, but I still have a misfire in that cylinder only. I sprayed soapy water all around the intake manifold and there are no leaks I have read the repair manual about 4 times and I still can not find the problem can you please help me with this problem? This is the first time I have been on this web site and if this works out I will definitely be using again. Thank you

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Wednesday, January 28th, 2009 AT 9:16 PM

1 Reply

  • Tiny
  • rasmataz
  • Member

1997 Ford Expedition cylinder #4 misfire

Check the sparkplug/compression and injector for cyl no.4

Misfires 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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Wednesday, January 28th, 2009 AT 9:36 PM

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