Unexplained Revving
Thread Starter
Advanced
Joined: May 2018
Posts: 68
Likes: 15
From: North Augusta SC
Unexplained Revving
Yesterday evening, I washed my Corvette (94 6MT) and went for a quick drive around my neighborhood to dry it off. As I turned in a culdesac, I downshifted 3-2 to accelerate out, and motor revved to redline. I looked down and the tach was pegged at 6K. I kept the clutch in, held the brake, and turn the engine off. Coasted to a stop in the middle of the road, thankfully still in the neighborhood. Though the key was off, the dash display was frozen, showing 28 mph and the tach at 6k. I was going slower than 28 when I downshifted, so thats interesting. Turned the key to On, it all reset. Popped the hood, checked everything out, everything was dry and all throttle cables seemed to be connected properly. Checked the cruise control and it hadn't been switched on. Cranked it up, drove home, and everything has been fine since.
Any ideas? Has this happened to anyone else? Really freaked me out for a moment, but thankfully it was only revved for 2-4 seconds. Also, do the LT-1's have rev limiters? It didn't seem to bounce off of one, just a steady pegged at 6K+ rev.
Any ideas? Has this happened to anyone else? Really freaked me out for a moment, but thankfully it was only revved for 2-4 seconds. Also, do the LT-1's have rev limiters? It didn't seem to bounce off of one, just a steady pegged at 6K+ rev.
Intermediate
Joined: Jul 2014
Posts: 32
Likes: 3
From: State College Pennsylvania
1994 RPM Surging
This must be a common problem with the 1990's model years, because it is even referenced in my 1994 owner's manual with a quick fix remedy. I own a 1994 automatic LT1, and have had in the past a fast idle and engine surging issue also. I was so concerned that when I was stopped at a red light, I would put my car in neutral if the engine started surging in case I bumped into the car ahead of me. In my 1994 manual it is referenced on page 46 under the title 'Rough Idling'. The manual provides the following solution to remedy this situation. "1. Set the parking brake. 2. Shift an automatic to "P" (Park) or manual transmission to "N" (Neutral). 3. Press the accelerator until your tachometer reads 2,000 rpm and hold for two minutes. Hope this helps, it worked for me.
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
This must be a common problem with the 1990's model years, because it is even referenced in my 1994 owner's manual with a quick fix remedy. I own a 1994 automatic LT1, and have had in the past a fast idle and engine surging issue also. I was so concerned that when I was stopped at a red light, I would put my car in neutral if the engine started surging in case I bumped into the car ahead of me. In my 1994 manual it is referenced on page 46 under the title 'Rough Idling'. The manual provides the following solution to remedy this situation. "1. Set the parking brake. 2. Shift an automatic to "P" (Park) or manual transmission to "N" (Neutral). 3. Press the accelerator until your tachometer reads 2,000 rpm and hold for two minutes. Hope this helps, it worked for me.
Veddy intorestnk!
(If you recognize this picture, you're an old fardt like me! (Arty Johnson - "Laugh-in" comedy hour)
Thread Starter
Advanced
Joined: May 2018
Posts: 68
Likes: 15
From: North Augusta SC
This must be a common problem with the 1990's model years, because it is even referenced in my 1994 owner's manual with a quick fix remedy. I own a 1994 automatic LT1, and have had in the past a fast idle and engine surging issue also. I was so concerned that when I was stopped at a red light, I would put my car in neutral if the engine started surging in case I bumped into the car ahead of me. In my 1994 manual it is referenced on page 46 under the title 'Rough Idling'. The manual provides the following solution to remedy this situation. "1. Set the parking brake. 2. Shift an automatic to "P" (Park) or manual transmission to "N" (Neutral). 3. Press the accelerator until your tachometer reads 2,000 rpm and hold for two minutes. Hope this helps, it worked for me.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
I don't thing ^^That's^^ it either.IDK that it was at WOT. 1/4 - 1/3 throttle is likely enough to get the engine to the rev limiter, unloaded.
