no spark

Asked by Feb 06, 2016 at 03:51 PM about the 1996 GMC Sierra 1500 C1500 SLE Standard Cab SB

Question type: General

I change out motors and wiring harness from 4.3 to 5.7 I'm getting power to the coil and ignition module but not out of the coil

11 Answers

71,245

You need the PCM also. (computer)

Yeah I changed it with the wiring harness

71,245

If you have power to the coil, but no spark yet, I would take the coil & the ignition control module off and have it tested at Auto Zone.

1 of 1 people found this helpful.

There also brand new

Also changed pickup coil in the distributor and crank position sencer checked all grounds

71,245

Everything is working should have spark. Try checking with a spark plug laying on the manifold? Is there spark out of the coil wire itself?

71,245

What year is the engine?

No spark out of the coil its a 96 vortec

71,245

Is the coil grounding points good and clean?

Yeah I even added an extra ground cable to the coil when I put it in

71,245

Well I guess you are going to have to get some things check out. Power to the coil, right, power to the ICM, power goes from that to the coil, so there is power. Before having to test the ICM, coil, and the ECM, maybe check to see if there is power at the coil when cranking/starting position. Maybe has something to do with that circuit. And the distributor...the distributor, is that in wright?

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