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96 blazer misfire

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5 years 8 months ago #22853 by Dr. Seydel
96 blazer misfire was created by Dr. Seydel
Help please
96 blazer misfire. Secondary wave form on the coil looks like this
[attachment=3892]872E45F7-4E7C-4B8D-8598-D2D4B20EC908.jpeg[/attachmen
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5 years 8 months ago #22856 by Tyler
Replied by Tyler on topic 96 blazer misfire
Hey Dr. Seydel, moved this to the Repair section.

Does that abnormal waveform come up every six firing events? If so, I think you're looking at a shorted secondary somewhere. Water in the plug boot will do this. A badly blown head gasket (with coolant across the plug gap) will, too.

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5 years 8 months ago #22860 by Dr. Seydel
Replied by Dr. Seydel on topic 96 blazer misfire
I’m not sure. I’m going to hook up a second channel on my modis to determine which cylinder it is. I thought it was a bad wire. Tried moving it to different cylinder and do drop test but it’s too hard to pull the wires while it running. I’ll try tomorrow. Thanks for the reply

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5 years 8 months ago #22862 by Chad
Replied by Chad on topic 96 blazer misfire
A plug wire that is not seated properly can do that, too.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)

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