Question about 2003 Ford ZX2

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I have a 2003 ford ZX2 I have a number 2 and 3 cylinder are not getting spark the coil has been tested and found that is was grounded out on one side of the coil I replaced the coil after testing the new coil to the old coil the new one tested good and still tested good i tested the wires going to the coil and i know that its a ground side switch and both sides ohm out ok showing that i dont have a short or a open but i dont have a proper test light to see if i get the correct pulse from the wires and my DMM doesnt have a duty cycle to check nor do I have a scan tool my question is where does the signal that runs to the coil come from i already took a leap of faith and changed the cam shaft sensor i dont know if there is a way to check the wires going to that sensor i can check for ohms for shorts or opens but my main problem is is the signal going to the processor and being sent back HELP!!!

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  • Ford Master
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Coil on plug ignition or coil pack ? American vehicle or UK ? The PCM - engine computer controls the coil by the use of a transistor inside . Testin can be do with a test light . Video on youtube , posted by scanner danner , a teacher at a technical school . Should have B+ voltage on one side an the PCM supply's a ground . Have seen a number of fords coil shorts out frying the PCM . Would set a code .

Posted on Mar 11, 2017

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alicantecoli
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SOURCE: 2001 ford mustang 3.8, standard. no secondary

not sure on this because no mustangs in spain but from the symptons described ??had similar with escort and focuses and the only soloution was the dealer ,its the factory immobilisor playing up now i know how to by pàss it ,but not every customer wants it by passed so then its dealer job with dealer prices and i just smile when they tell me how much they paid

Posted on Sep 08, 2009

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If your saying number 2 spark plug coil is getting no ground from computer when cranking, I'd have to check wiring connectors on both ends and do continuity test of the ground wire to computer. If everything checks out, check computer.

I suppose you swapped the coil from one cylinder to the next, to see if problem followed the coil?

You do have primary voltage going to coil, correct?

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