No Spark to the spark plugs?

Tiny
STEVE W.
  • MECHANIC
  • 15,233 POSTS
OK the brown wire having power with them all unplugged shows that you have at least one bad coil, The blue/white wire is ground. From those tests I would say you have two problems, the smoking coil(s) are bad and the driver for the smoking coil is bad. That is inside the power control module. With it stuck on it holds the power on full time to that col and has burnt it out, OR the coil failed and took out the driver transistor, either way is possible. So you need a PCM and I would replace the coils as well.
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Monday, November 17th, 2025 AT 7:31 PM
Tiny
JOE1953
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OK the brown wire having power with them all unplugged shows that you have at least one bad coil, The blue/white wire is ground. From those tests I would say you have two problems, the smoking coil(s) are bad and the driver for the smoking coil is bad. That is inside the power control module. With it stuck on it holds the power on full time to that col and has burnt it out, OR the coil failed and took out the driver transistor, either way is possible. So you need a PCM and I would replace the coils as well.

Can the PCM be tested for a bad driver transistor how can I do this test? Getting back to the beginning when the problem first started, the car was run a day before car park overnight and the next day the car would start and cut of and I scan for codes and they was PO351-PO352-PO353-PO354.
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Tuesday, November 18th, 2025 AT 6:21 AM
Tiny
JOE1953
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Can the PCM be tested for a bad driver transistor how can I do this test? Getting back to the beginning when the problem first started, the car was run a day before car park overnight and the next day the car would start and cut of and I scan for codes and they was PO351-PO352-PO353-PO354.
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Tuesday, November 18th, 2025 AT 6:22 AM
Tiny
KEN L
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It is best to send the PCM for testing, it sounds like it is bad, especially with the codes numbers in a row like that.
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Tuesday, November 18th, 2025 AT 10:32 AM
Tiny
JOE1953
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Do you know where I can send the PCM for testing?
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Tuesday, November 18th, 2025 AT 11:31 AM
Tiny
STEVE W.
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I would suggest contacting Maic Salazar, he does PCM testing and repairs and stands behind his work. https://www.maicsalazardiagnostics.com He is on youtube as well if you want to see what is involved in the work. However you can do limited testing yourself. Go to the coil that was smoking, unplug it, now connect your test light to ground and to the uncommon wire on terminal 3 in the connector. Turn on the key, does the light come on steady? Switch the test light to battery positive and try again, does the light come on steady. That is the control wire and should only flash as the ECM fires the cylinder. Steady light with either of the two tests means the driver is bad.
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Tuesday, November 18th, 2025 AT 12:44 PM

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