4.6 Keeps shorting/melting/burning coil packs

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03-22-2016, 09:28 PM

#11

Drastang

2nd Gear Member

Join Date: Feb 2015

Location: Florida

Posts: 223

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.

03-22-2016, 11:12 PM

#12

jwog666

5th Gear Member

Join Date: Mar 2008

Location: wisconsin

Posts: 2,260

Quote:

Originally Posted by Drastang

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.

03-23-2016, 06:39 AM

#13

Drastang

2nd Gear Member

Join Date: Feb 2015

Location: Florida

Posts: 223

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

02-10-2019, 04:34 PM

#14

00gtnewedge

Join Date: Feb 2019

Location: Ny

Posts: 1

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

02-11-2019, 06:07 AM

#15

latinheat1018

Thread Starter

Join Date: Mar 2016

Location: Texas

Posts: 8

Quote:

Originally Posted by 00gtnewedge

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 didn’t 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.