rough idle only when cold start
Thread Starter
7th Gear
Joined: Jun 2012
Posts: 7
Likes: 0
rough idle only when cold start
i have a 92 corvette when i start it in the morning or after it sat for awhile runs really rough almost dies just at idle but after driving for awhile it smooths out and runs fine can someone please give me some ideas ive changed plugs wires most sensors.did not do that till i had a injector go out took it to shop they changed it and now rough idle they checked everthing said what they did was ok please help
Burning Brakes
Joined: May 2011
Posts: 838
Likes: 2
From: Louisville Ky
i have a 92 corvette when i start it in the morning or after it sat for awhile runs really rough almost dies just at idle but after driving for awhile it smooths out and runs fine can someone please give me some ideas ive changed plugs wires most sensors.did not do that till i had a injector go out took it to shop they changed it and now rough idle they checked everthing said what they did was ok please help
I am not an lt1 owner, so won't volunteer anything to confuse you. but start with codes.
joe
Instructor
Joined: Mar 2010
Posts: 216
Likes: 4
From: Shrub Oak NY
Check the vacuum line connections against the diagram in the engine compartment. When I got my 84 the vacuum lines were all screwed up and I think there is something that the charcoal canister purge solenoid does when the engine is cold that can create a big leak if its not connected right. It does not take long to check and you would be surprised how many cars have their vacuum lines wrong. Maybe it happened while they were doing the injector work.
