Coils and ignition module

Tiny
MIKEJON05
  • MEMBER
  • 2001 CHEVROLET MONTE CARLO
  • 3.6L
  • V6
  • FWD
  • AUTOMATIC
  • 91,200 MILES
Will a faulty module cause the coils to fail?
Friday, September 1st, 2017 AT 7:04 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,577 POSTS
It could but the opposite is also possible as well. In the first one the module output transistor fails and instead of pulsing the coil it gets sent straight voltage which causes it to overheat and fail.
In the second the coil shorts internally which draws more current than those transistors are designed for and the module fails.
What is the problem with your vehicle?
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Friday, September 1st, 2017 AT 10:05 PM

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