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Why is the #4 clyinder not firing?

Tiny
IOWAN86
  • MEMBER
  • 1998 FORD CONTOUR
  • 145,000 MILES
I have a 1998 ford contour SVT, has the 2.5 DOHC v6. There is no spark whats so ever coming from the ignition coil for the #4 cylinder. I replaced the coil and still the same problem, all the others seem to be running just fine. I am wondering if it could be the crankshaft sensor or maybe the cam shaft sensor, but I do not want to replace both and have that still not fix it. If you think it might be one of those can you please tell me where they are located on my vehicle. Thank you
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Sunday, October 23rd, 2011 AT 6:58 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
It's not likely going to be either of those. I would more suspect a problem in the wiring somewhere. Use a noid light to test for pulse at the plug for that coil to see if it's getting the right signal and if it isn't, determine whether it's the power supply or pulsing ground that is missing.
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Tuesday, October 25th, 2011 AT 11:43 PM

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