Question about 2007 Ford Focus 2.0

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It is only firing on three coils it is like no power going to #3 coil what could be wrong? Wiring?

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By using a jumper wire, can you test the #3 coil driven by the #1 ignition pulse? Also could test the #3 ignition pulse by jumpering to #1 coil.

Posted on Apr 03, 2015

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VALVE COVERS CAN LEAK INTO THE COIL WELLS AND SHORT OUT THE COIL. BUY A NEW COIL AND INSURE THAT THE PLUG IS GOOD AND NO OIL IS IN THE COIL WELL.

Posted on Apr 03, 2015

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There can be many things related to the misfire
1) Short Coil
2) Improper spark plug gap
3) Carbon deposit on the spark plug
4) Wiring issue ( coupler )
If you are sure it is related to coil then check the wiring voltage with a multimeter and make sure than wiring it ok. There is simple method to test which ignition coil i not working , I am sharing a video for that. Once you are sure which one is not working then replace it.

Good Luck

Posted on Apr 03, 2015

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With Type I Ignition


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With Type II Ignition

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or...

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