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Dead cylinder

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Old 12-11-2011, 03:44 PM
  #31  
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Bump, still needing an answer.
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Old 12-11-2011, 07:07 PM
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I've seen the connectors on the coils go bad.
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Old 12-11-2011, 08:08 PM
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I guess the plugs could get nasty. I will try and clean out the plug real good.

I am really needing to get to the bottom of this as I think this truck may be getting sold.
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Old 12-11-2011, 09:32 PM
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Originally Posted by kode-x-kustoms
We don't have spark, I am almost 100% sure we have fuel. Just no spark.
did you swap the coil packs with a known good one???
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Old 12-12-2011, 05:36 AM
  #35  
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Yes we did still no spark.
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Old 12-12-2011, 05:49 AM
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Time for a compression test...
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Old 12-12-2011, 06:00 AM
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I guess I could do a compression test, but I still think it is something in the wiring.
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Old 12-12-2011, 06:05 AM
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Originally Posted by kode-x-kustoms
Ok we check for continuity all the way back to the pcm and it was good.
Unless your continuity checks were inconclusive, which you claim they weren't...then it isn't in the wiring.

So, you said that you were getting intermittent spark to #5, yet the wiring itself checks out. That points to the PCM as the problem. However, single cylinder failures due to a fault in the PCM are extremely rare. Do a compression test to ensure everything mechanical is good.
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Old 12-12-2011, 06:24 AM
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Yeah I will do a compression test to see. The strange thing is it ran good, it never seemed to lose power.
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Old 12-12-2011, 05:58 PM
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Ok... we found the problem... the new plugs I put in, the tip on number 5 must have got broke when I pulled them out to put antiseize on... I feel like an idiot!
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