Well I did the optispark and now I got no spark. I tested the wire coming off the optispark thats supposed to get like 5 volts -, and Im getting 12 -. I tried to unhook the coil before that and got nothing, but if its getting 12 volts to the negative on the coil that'll do it. All I did was take off the water pump, unplug the optispark and take it out ,unhook the negative on the battery(I forgot before), put the Opti back in , plug wires in, water pump, and the battery negative. Thats it. What did I do?

 

when I got no spark I believe one of the connectors in my wiring harness blew somehow, and had to be replaced. check the voltage in the four-wire-plug that goes into the plug above your coil (ignition module i think).

check the voltage there.

 

i remember when this happend to me. we tested everything and it seemed ok. ended up bein a bad replacement opti. definately dont overlook that.

 

thats what Im thinking. That would suck to have to pull all that again! anybody else think thats the problem?

 

you mean you didn't start it up without the cooling system attached for a second just to ensure everything worked fine? man that sucks!

 

gee thanks. now they tell me. No I dont think Ive ever had something bad right outta the box so I was going on my good luck. Just glad I left the $7.00 gallon of prestone in my buddies car and didnt get a chance to put it in yet! I will start it with no water pump next time

 

it's fine to start it with no water pump, just don't let it run. I read an article on how to install an opti a loooong time ago so when i did mine, i followed his advice and gave it a test-start to ensure it started.

 

the 2 wires on the ignition module that are supposed to get 12volt+ are getting it. The other wire that is supposed to get an A/C signal from computer on cranking isnt getting it. The wire on the distributor plug that it suppoed to be getting 5V- is getting 12v+. Im about to order a computer from pcmforless.com. I dont know what else to do.

I talked to Brian at pcmforless and he said some people are getting dead optisparks straight from GM. Is there anyway to test it straight outta the box? Maybe see if its dead first? before I install?

 

I don't think there's a way. Anyway you said that the wire that is suppose to get an A/C signal on cranking isn't getting it? Maybe that's your problem there.

 

it was the same thing before the optispark was replaced. its suppossed to get a signal from the computer just like the ignition module is suppossed to and both of which arent

 

I gotta bump this back up again TTT

 

If you haven't check this page under Opti and Spark Test.

http://csce.uark.edu/~jgbertr/rb/4th...html#opti_test

It sounds like it probably is a bad opti. I just replaced mine and it ended up being bad. Jason is sending me a new one, it should be here tomorrow.

 

thanks man Ill look into it

 

ok heres what Im going to do. I got the original opti back and Im going to put it back in tommorrow and see if it starts or not. I think both those 2 new optis I got were bad. Maybe this will help till the computer comes in and Ill know whats going on

 

I pulled the 3rd optispark out today and set the 1st one back in and I still get no spark. SO I dropped in the second one and let roll. I am now waiting on my computer from pcm4less and I really hope thats it being as I cant get any help and Im new to all this.