Check for spark directly at the coil first. Get an old spark plug & spark plug wire and plug in to the coil laying the plug on the intake or something grounded metal. Crank & watch. No spark? Check fuse, 10 amps in the under hood fuse block.

Good spark? The problem is inside the distributor.

 

Thats what im going to do when i get home later this week. Im out of town for work right now and its bugging the crap out of me not knowing where whats wrong. Thanks all you guys for all your help.

 

Welp i just got back a few hours ago and started trying to figure out whats going on. I cleaned the corrosion off the opti harness, checked for spark at the coil, checked EVERY connector i could find and got no where.

 

So no spark from the coil?

 

My coil connector had a short in it and had very similar symptoms as your describing, some food for thought

 

I had the same problem. The wires were corroded and burned with electrical tape just rigged on there holding them together. I fixed that and it fired right up. That was of course after an opti change, icm test, and coil change.

 

No spark at the coil. Ill check the connector on the coil over tomorrow.

 

Mine was as gm had made it, if I wiggled it to the right spot, it would fire right up and run just fine, got a new one from napa, soldered it in and it hasn't given me a problem yet. It has also happened to me on the icm and now the coolant temp sensor in the wp. When I go 24x, that efi connections harness is looking pretty good to me after these problems, although I may try the repin kit to save $.

 

Did you do this?

 

Yea paul i chevked the fuses and they were all good.

 

Checked all the connectors to the coil and icm and still not firing.

 

Just used my friends working icm and coil and got nothing.

 

Are the injectors firing? Then at least you know you are getting a signal from the opti.

 

I dont know i didnt check because i knew i didnt have spark. So i kinda just ruled fuel out.

 

Welp ive tryed everything i know if and still no spark.

 

You now need to check the harness man. If a known good coil has no spark then my guess is you no longer are getting a signal from the PCM for some reason.

 

I thought that a dead opti can keep the coil from getting spark also?

 

Well, from my understanding the optical sensor in the Opti sends a signal to the pcm. The PCM then sends the signal to the injectors and ICM/coil. If your injectors are firing then that would rule out a bad opti or PCM. Then you could start checking the wiring harness. A bad opti can cause a no spark condition at the coil and the injectors wont puls IIRC. I doubt its the opti but it doesnt hurt to check.

I remember from a previous thread on here a guys ignition switch caused a no spark condition like you have. Ill see if I can find the thread.

 

Thanks man i appreciate the info i didn't know that it would keep the injectors from firing. Ill get on checking it first thing when i wake up.

 

Just looked it up and low res. controls injectors and high res. controls coils and spark.