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Coil pack overheating

Tiny
KIM MOOK
  • MEMBER
  • 2005 PONTIAC GRAND PRIX
  • 2.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 178,000 MILES
Car wouldn't start, while looking under hood I put my hand on coil pack and it was extremely hot. Took it off and it had melted. Bought a new one getting crank but no spark and coil pack is still getting very hot when car not even warm. I have to unhook the positive off battery.
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Sunday, December 8th, 2019 AT 10:30 AM

9 Replies

Tiny
AL514
  • MECHANIC
  • 4,104 POSTS
Hello, did you replace the ignition module that sits under the coils?
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Sunday, December 8th, 2019 AT 11:32 AM
Tiny
KIM MOOK
  • MEMBER
  • 8 POSTS
No I haven't. Should i?
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Sunday, December 8th, 2019 AT 12:07 PM
Tiny
AL514
  • MECHANIC
  • 4,104 POSTS
The ignition module controls all the coils, if the new coils are overheating there is probably a fault with the module. Most of the time we've replaced the module and coils at the same time. There's a lot of current flow going through all of it. If the module has high resistance for some reason this creates a lot of heat, and will start melting things as you've seen. Follow the instructions when installing the new module also.
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Sunday, December 8th, 2019 AT 12:38 PM
Tiny
KIM MOOK
  • MEMBER
  • 8 POSTS
Okay I will surely give this a try. Thank you so much for your time.

Sincerely,
Much appreciated
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Sunday, December 8th, 2019 AT 1:21 PM
Tiny
AL514
  • MECHANIC
  • 4,104 POSTS
Check the plug for the module, make sure there's no green corrosion in there and the wires look okay.
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Sunday, December 8th, 2019 AT 1:38 PM
Tiny
KIM MOOK
  • MEMBER
  • 8 POSTS
Will do. Thank you so much again.
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Sunday, December 8th, 2019 AT 2:30 PM
Tiny
AL514
  • MECHANIC
  • 4,104 POSTS
You're welcome, any other issues and we're here. Cheers!
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Monday, December 9th, 2019 AT 5:44 PM
Tiny
KIM MOOK
  • MEMBER
  • 8 POSTS
Bad ignition module you guys are awesome. Such a big help. Thank you again.
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Tuesday, December 10th, 2019 AT 8:43 AM
Tiny
AL514
  • MECHANIC
  • 4,104 POSTS
You're welcome, have a good night.
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Tuesday, December 10th, 2019 AT 2:02 PM

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