Guys,
I came back home last night, got in the driveway, backed out of it to park in the street. Put the car in drive and it stalled.

Now I tought it ran out of gas but no, the car has no spark...wtf ?
So I changed the coil, still no spark. I checked for loose wires , didn't find anything.

Now I'm thinking it's the optispark, but why would it just die like that ??? is it possible ???

Can I put a 95 vented optispark on a 93 LT1 ??? will it work ???
I can get a great deal on ebay right now but I need to know fast, the auction is ending like in 1 hour.

Thanks

 

I also noticed that spark plugs are dry after cranking for a long time. Maybe no injector pulse.

I check the coil. it's good.


I tought it could be vats , so I checked it and it's fine, and since the engine is cranking it means that it's working.

I also checked the power feed to injectors, it's all good.

Now since it and no spark, no fuel. I'm thinking it might not be the optipark.

Anybody has suggestions ?

 

Anybody as a service manual for 92-93 corvette-93 camaro ???

I need pages from "Engine cranks but will not start"

 

I read in an old post :

If the injectors aren't firing then the ECM isn't seeing the reference pulse from the distributor. Without the pulse it will not fire the injectors. You need to findout where the pulse is not getting through.

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Is it the same with Lt1's optisparks ???? could it be a faulty optispark ???

 

If there is no spark and no reference pulse to the ECM, I'd lean towards the distributor, but I don't know much about the Optispark system. I have read on the GMECM mail group that most there think they are junk and prone to failure.

 

Ok got an update, wired my ses light properly and also my aldl connector.

Now it's trowing code 46 ....

Which is VATS ALERT, the Haynes manual says " Check for faulty circuit from ignition switch to theft deterrent modem or ECM/PCM"


I have check all the connections, there's

bat power, ignition power, starter enable relay feed, resistence is ok, fuel enable signal, I don't know how to test it, and I checked also ground, it's good ...

I also checked all the ignitions power feeds, and all bat feeds to ECM, nothings wrong

does that look like a faulty VATS ???

 

did you get the opti from E-bay?

 

I did not . I'm getting a new passkey II.

 

Anybody knowns how to program a new passkey ?