No Spark.
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No Spark.
To start Ill go with what i have replaced and tested- 1st-new ignition coil 2nd- replaced ecc with numbers matching. 3rd- tested power to coil on pos with dmm and neg side with test light. while cranking it flashes and stays on when no cranking. 4th- tested icm with tfi-iv tester and that showed fine.
I have been fighting this issue for a couple weeks now. The truck is aking up space in the garage and i really need it for work. Anyone have any ideas?
I have been fighting this issue for a couple weeks now. The truck is aking up space in the garage and i really need it for work. Anyone have any ideas?
Fleet Owner
Joined: Oct 2005
Posts: 20,789
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From: Kentucky
That tells you right there you should have spark out of the coil. Now it's time to verify it is getting to the distributor and out to the plugs.
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New User
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No its not lighting up with the coil wire. It's getting power into the coil with the pip signal and the key on. It's has no spark out of the coil.
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Fleet Owner
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Fleet Owner
Joined: Oct 2005
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From: Kentucky
Good info here: http://www.aa1car.com/library/ignition_coils.htm
Check the coil secondary resistance.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
That indicates the buffered PIP signal is triggering the coil On/Off. The PIP signal is buffered by the computer before it goes to the Ignition Control Module. The fact you get flashing indicates that circuity is intact. To me it appears to be a bad coil (secondary winding) if you cannot get spark out of it. Perhaps your tester is bad?
You can also validate the theory above by momentarily grounding the negative side of the coil while power is applied, you should get a spark out of the coil.
