‘92 LT1 Corvette cannot idle?
Thread Starter
6th Gear
Joined: Feb 2026
Posts: 6
Likes: 1
‘92 LT1 Corvette cannot idle?
Hello all
i have a 1992 LT1 corvette wich ran perfectly. No problems at all. New optispark fitted etc etc. I left the car standing for a week in my dry garage. Suddenly when i start the car it “runs” like a classic tractor. Not only that, it pops, bangs, and just is horrible. Feels like it fires on 2 cylinders. And there is alot of smoke coming from the exhaust. If my foot is not on the gaspedal the car wont even idle at all. The interesting part is when i parked it in the garage it ran perfectly with no issues at all. I did not touch the car in this weeks time so what in gods name could this issue be? Can’t see any codes (that part of the car doesnt function)
thanks in advance
i have a 1992 LT1 corvette wich ran perfectly. No problems at all. New optispark fitted etc etc. I left the car standing for a week in my dry garage. Suddenly when i start the car it “runs” like a classic tractor. Not only that, it pops, bangs, and just is horrible. Feels like it fires on 2 cylinders. And there is alot of smoke coming from the exhaust. If my foot is not on the gaspedal the car wont even idle at all. The interesting part is when i parked it in the garage it ran perfectly with no issues at all. I did not touch the car in this weeks time so what in gods name could this issue be? Can’t see any codes (that part of the car doesnt function)
thanks in advance
Le Mans Master
Joined: Dec 2005
Posts: 8,534
Likes: 921
From: Communist Colorado
Hello all
i have a 1992 LT1 corvette wich ran perfectly. No problems at all. New optispark fitted etc etc. I left the car standing for a week in my dry garage. Suddenly when i start the car it “runs” like a classic tractor. Not only that, it pops, bangs, and just is horrible. Feels like it fires on 2 cylinders. And there is alot of smoke coming from the exhaust. If my foot is not on the gaspedal the car wont even idle at all. The interesting part is when i parked it in the garage it ran perfectly with no issues at all. I did not touch the car in this weeks time so what in gods name could this issue be? Can’t see any codes (that part of the car doesnt function)
thanks in advance
i have a 1992 LT1 corvette wich ran perfectly. No problems at all. New optispark fitted etc etc. I left the car standing for a week in my dry garage. Suddenly when i start the car it “runs” like a classic tractor. Not only that, it pops, bangs, and just is horrible. Feels like it fires on 2 cylinders. And there is alot of smoke coming from the exhaust. If my foot is not on the gaspedal the car wont even idle at all. The interesting part is when i parked it in the garage it ran perfectly with no issues at all. I did not touch the car in this weeks time so what in gods name could this issue be? Can’t see any codes (that part of the car doesnt function)
thanks in advance
Thread Starter
6th Gear
Joined: Feb 2026
Posts: 6
Likes: 1
The port is gone somehow, i know where it is normally and i looked for it. Not there. Not behind the panels in the wiring somewhere hidden either. Im looking for a practical solution so to speak. What could this issue be?
Le Mans Master
Joined: Dec 2005
Posts: 8,534
Likes: 921
From: Communist Colorado
If you have an operable optispark, then you have an ECM in turn there has to be an OBD port somewhere
