need diagnosis help
Thread Starter
1st Gear
Joined: Aug 2010
Posts: 1
Likes: 0
need diagnosis help
I have a strange problem that I need diagnosis help with. After starting my C4 cold, it runs well for about 45 minutes then starts to miss and run rough. When stopped at a light when doing this it will surge. If you shift in neutral when stopped it will go from about 800 rpms to to 1500 for about 5 seconds then settle back to 800. It is up to temp after maybe 15 minutes, so doesn't seem to be a temp related issue. I'm thinking its a sensor issue...this is driving me crazy trying to figure this one out...can anyone help me diagnose this problem?
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Year model helps when asking questions;
many year to year differences ,completely different engine types and computers
Pull the codes to see if anything showing up
http://www.corvettebuyers.com/c4vettes/codes.htm
