1994-95 LT1 Thread!

[mewascom]

Does the SECURITY light come on when you move the switch to ignition? Can you connect to the PCM with EEHack without errors? My first thought is VATS, to be honest. If VATS is the issue then when you turn the key the “SECURITY” light will come on solid and EEHack will rack up errors trying to connect.

no, none of that. Turned over cranked, stumbled and died. Waited two days and
the car actually started anD ran rough for a minute and then smoothed right out.
I guess the Opti might have had moisture in it and when the weather cleared and warmed up it dried out. 95 so opti is vented.
Drove the car for an hour and alll was fine. Turned it off and starts back up, smooth as silk.

[LeMarky Dissod]

Check and or clean the coil wire and all the wiring running to the Opti-Spark, including that electrical wiring harness that plugs into the Opti-Spark.
The wiring for the H2Opump temp sensor is very thin gauge. If it misbehaves, it commands a richer AFR, meaning it might not start, or it might start and run rough. Wiggle test works pretty well here.

If the Opti-snorkel is not working right, it might also give similar symptoms til it dries out.

[mewascom]

Check and or clean the coil wire and all the wiring running to the Opti-Spark, including that electrical wiring harness that plugs into the Opti-Spark.
The wiring for the H2Opump temp sensor is very thin gauge. If it misbehaves, it commands a richer AFR, meaning it might not start, or it might start and run rough. Wiggle test works pretty well here.

If the Opti-snorkel is not working right, it might also give similar symptoms til it dries out.

Thanks for that info,I’ll check those out.