We are working on my buddys 94 T/A and have just replaced the opti, coil, and ignition module. After all of this we are still not getting a spark out of the coil.

We did some testing at the ign module connector and found 12V on both pins A and D. We found about 2V AC on pin B and about .2Ohm to ground on pin C. So it looks like we are getting everything we need at the ignition module.

Since we have a good AC voltage at the module, that would tell me that the opti/pcm circuit is working as it should, correct? Im kind of leaning toward a defective module/coil. Am I forgeting anything? Any other tests I can do?

Any inputs or suggestions are very helpful

 

anyone?

 

As far as tests go I dont know of any more. The coil and ECM go bad fairly often and could be your problem. Also, check to make sure the connector for the opti wiring harness is working properly, check to make sure all the pins inside are where they should be and not pushed back into the connector itself.

 

Is there spark at the coil?

 

Well it turns out that we had a faulty new ign module. We took it back and got another one and she purrs like a kitten now.