No spark no start

[kim]

Ok, just changed the opti which was shot and I still have a no start. There is no spark from a changed coil and new icm. Any ideas gentlemen.

 

[93Rubie]

Assuming you have everything plugged back in?

Can you swap out the coil/ICM with the old ones real quick?

There isn't too many things to test for on the LT1 ignition.

Make sure the Opti-Spark has power and such. Same with coil/ICM. Maybe check the wires going to the ECM as well.

If you have a scan tool handy checking for low resolution signal and high resolution signal from the Opti-Spark while cranking might be a good idea.

Check the coil wire as well.

 

[toptechx6]

Good test procedure here including wiring diagrams. Proper method for diagnosing a bad Opti - CamaroZ28.Com Message Board There is no substitute for testing, a "new" part is not a guarantee of proper function. Pay particular attention to the wiring tests, far more likely to be a problem than a bad part in my experience.

 

[kim]

I did some tests from the FSM and the coil and icm check out but one of the tests from your link leads me to the ignition fuse. I have one question, where is it.

 

[toptechx6]

If it is the same as my 93, the FSM shows a single 10 amp "COIL" fuse in position #25 of the fuse panel at the right side of the instrument panel

 

[kim]

Thank's Top Tech, will check it out.