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4.6 Keeps shorting/melting/burning coil packs

Old 03-22-2016, 09:28 PM
  #11  
Drastang
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my coils where old rubber corroded got water down shaft and that ruined them could barley get a spark never threw a code. so yeah a coil will run on low voltage or grounded and still spark.
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Old 03-22-2016, 11:12 PM
  #12  
jwog666
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Originally Posted by Drastang View Post
my coils where old rubber corroded got water down shaft and that ruined them could barley get a spark never threw a code. so yeah a coil will run on low voltage or grounded and still spark.
water on a coil is not the same thing as a short to ground, water is a poor conductor,and simply provides a path to ground for the spark after it is generated in the secondary circuit. the coil being shorted across the ground side of the primary circuit directly to ground will cause a dead miss, a coil will not fire if it is constantly grounded. this is a fact supported by Faraday's law of induction, and will result in melted coils.
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Old 03-23-2016, 06:39 AM
  #13  
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even after the water was gone and damage done still no codes ..just saying yes you can have issues with coils and have no codes. but a data logger will be able to tell you guys at Lamotta looked at mine knew right away because it gave them the exact numbers at the coil. my coils 1, 4 and 8 where down no codes
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Old 02-10-2019, 04:34 PM
  #14  
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Hey, did you ever end up figuring out your problem. I just bought a new edge with 72k kid thought it needed a motor but the problem your describing is exactly what I have going on
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Old 02-11-2019, 06:07 AM
  #15  
latinheat1018
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Originally Posted by 00gtnewedge View Post
Hey, did you ever end up figuring out your problem. I just bought a new edge with 72k kid thought it needed a motor but the problem your describing is exactly what I have going on
I solved the problem by switching all coil packs. Given that the car was a 2000 and it still had the original coil packs, I figured that if I just kept switching one coil pack at a time the issue would just jump to the next weakest point in the circuit. After doing that, the car stopped burning them. And I didnít get any trouble codes. And all spark parameters were within range.
I still have the computer that I bought in case I had to switch it. But never had to.
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Old 02-12-2019, 05:18 PM
  #16  
WJL
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Is just one coil melting down or multiple coils
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Old 02-13-2019, 05:45 AM
  #17  
tadpole1969
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had same problem on my 01 ,changed engine wireing harness problem was solved
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