I am pretty sure that my spark problem is wiring related to the optispark. Only problem is that it only happens when I have been driving it and it gets hot. I obviously dont want to go out driving and have it die again. How in the world do I check wiring when its an intermentant problem?

 

If the Opti harness wire or connector is faulty, and causing intermittent problems, it should be setting the trouble codes for loss of high resolution (P0372) pulse and/or loss of low resolution (P1371) pulse. Have you scanned it? The codes will stay stored long enough to allow you to check them, even if the problem is intermittent.

 

It shows a p1371 code. But like if I mess with the wires every once in a while it'll start back up and run fine. But somtimes it just dont want to go. It usualy happens when the engine bay is good and hot though. I dont really want to go drive it to replicate it and have to tow it again. Is there any way I can check the wiring with all of it working properly? Or can you think of a way to maybe make it do it again sitting in the garage?

 

Did you pull the harness connector off, to check for corrosion and/or bent pins? Common problem.... big glob of icky blue corrosion on the harness connector.

 

Fiddle with the harness while the engine is idling. Maybe that will give you some insight.

 

I tryed that, didnt work. Might try again tomarrow. Do you guys think it still could be the opti itself and just for some strange reason it decided to start after messing with harness?

 

Connector looked fine. Wires seemed a bit heat corroded but did not look bad. I kinda want to try to replace the pig tail on the harness first. Does anybody have a part # for it? Not the opti harness but the pigtail that harness connects to.

 

Oh and also, what is this blue stuff you speak of. Got a link?

 

You can get a complete vented Opti harness, from the gray connector to the Opti, from Casper. Summit has it for $34. The dealer will want about $120.

http://store.summitracing.com/egnsea...=KeywordSearch

I've never had the blue corrosion, but numerous people have reported it. It isn't unusual for copper parts to corrode badly when sulfuric acid from a leaking or overheating battery gets on them, and forms copper sulfate, which is blue. Or, perhaps its from the ozone, generated by the high voltage sparks in the cap, venting out the wire tower and corroding the parts.

 

I just replaced that part of the wiring. Do you by any chance have the part # for the pig tail that the opti harness connects into though?

 

It's the engine harness that the opti harness connects to. You might be able to find a compatible connector for replacement, but I am not aware of any pigtail available.

 

Just my luck I guess. Do you think I could get one out of a junk yard? I am just almost positive its in that part of the wiring..

 

Anybody know of any connector that will work?

 

I think I may have found a connector that might work. GM part # is 15306009. Let me know what you guys think.