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Old 06-01-2014, 01:49 PM   #38
ChevyTech
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Join Date: May 2004
Location: Minnesota
Posts: 4,620
Re: Can't find misfire

There is a piece of equipment that is made for testing the ignition modules. I actually triggers the module and make sure is works while it heats up the module. A common problem is for the module to fail as it gets hot. Nothing you can do at home compares to this test.

If it does not pass their test replace it for sure.
If it does pass the test, it does not mean it is flawless, and may still need to be replaced.

As stated before, make sure you use heat sink compound under the module.
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Did you give the model, year, engine, fuel system type, and transmission information?
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