1992 Cold Start Problems
Thread Starter
4th Gear
Joined: Jan 2023
Posts: 4
Likes: 0
From: Northeast Florida
1992 Cold Start Problems
Hello Corvette Forum,
I've got an issue with my 1992 during cold start in the mornings. The car will start up and run perfectly fine for the first 30 or so seconds and then try to die. The engine rpms will surge and then drop in a cycle before it turns off fully. On the second or third (if necessary) start-up, the car idles like it's supposed to and I can usually start to drive it. Some days the car will buck (almost like its misfiring) when it is driving especially as it nears 2000 rpm or more, but this problem goes away if I pull over and let it idle for another minute. The car will start up perfectly fine throughout the rest of the day, and it runs well as soon as the engine has some temperature in it. I believe the car is having trouble with its air-fuel mixture. The car is not throwing any codes.
I've attached a link to the car cold starting to better show what I mean:
If it helps you guys out, here is some possibly relevant maintenance done:
Fuel injectors, fuel filter, and fuel pressure regulator replaced last week
Optispark, spark plugs, and spark plug wires replaced within the last year.
Any help would be much appreciated. Thanks!
I've got an issue with my 1992 during cold start in the mornings. The car will start up and run perfectly fine for the first 30 or so seconds and then try to die. The engine rpms will surge and then drop in a cycle before it turns off fully. On the second or third (if necessary) start-up, the car idles like it's supposed to and I can usually start to drive it. Some days the car will buck (almost like its misfiring) when it is driving especially as it nears 2000 rpm or more, but this problem goes away if I pull over and let it idle for another minute. The car will start up perfectly fine throughout the rest of the day, and it runs well as soon as the engine has some temperature in it. I believe the car is having trouble with its air-fuel mixture. The car is not throwing any codes.
I've attached a link to the car cold starting to better show what I mean:
If it helps you guys out, here is some possibly relevant maintenance done:
Fuel injectors, fuel filter, and fuel pressure regulator replaced last week
Optispark, spark plugs, and spark plug wires replaced within the last year.
Any help would be much appreciated. Thanks!
Last edited by RadVett; Dec 10, 2023 at 05:56 PM.
Burning Brakes
Joined: Mar 2005
Posts: 1,082
Likes: 115
From: Richmond Hill Ontario
This looks like a sign of ignition failure. My first impression is Optispark.
But if you want to throw some things at it before that then I would start with ICM ( Ignition Control Module) , then long shot would be an Ignition Coil.
But if you want to throw some things at it before that then I would start with ICM ( Ignition Control Module) , then long shot would be an Ignition Coil.
