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Intermediate
Joined: Jun 2007
Posts: 49
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From: Cameron Park CA
New to forum
I just recently bought a 79 L82 for 5K. It's in pretty good shape with
90K on it but it does have some issues. Can anyone tell me why when I press the gas at 70 mph the motor starts to cut out and when I let off it returns to normal. This only seems to happen when I get up to 70mph.
90K on it but it does have some issues. Can anyone tell me why when I press the gas at 70 mph the motor starts to cut out and when I let off it returns to normal. This only seems to happen when I get up to 70mph.
Intermediate
Joined: Apr 2007
Posts: 25
Likes: 0
From: Viola Idaho
Welcome,this forum you will find alot of folks with alot of knowledge.Your situation reminds me of the same problem I had experienced.My problem was corrected after replaceing the advance vacuum diaphragm.About $15.00 bucks.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Welcome to the forum and congrats on the Vette. With a car that old and that mileage, a thurogh tuneup would be in order. As stated above it could be youe vac adv can, or a bunch of other stuff. A simple test on the vac can is to disconnect it with the engine running, the engine should slow down. I would look into new plugs, cap, rotor, maybe wores depending on what they look like. Get the advance setup correctly and make sure the distributor is right, it may be worn and need some work. Excessive play in the bushings and drive gear will make the timing unstable. Worn fly weights will also affect advance operation. Once all that is fixed up the carb needs to be gone thru and verified or rebuilt. There is a member here, Lars, he is the Carb guru, contact him about rebuilding your carb and distributor.
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
I just recently bought a 79 L82 for 5K. It's in pretty good shape with
90K on it but it does have some issues. Can anyone tell me why when I press the gas at 70 mph the motor starts to cut out and when I let off it returns to normal. This only seems to happen when I get up to 70mph.
90K on it but it does have some issues. Can anyone tell me why when I press the gas at 70 mph the motor starts to cut out and when I let off it returns to normal. This only seems to happen when I get up to 70mph.
folks here are greater when owners take on those responsibilites themselves...your choice which way to proceed.
but welcome to forum from a 78 L82 owner with 56k and in need of much mechcanical attention.
Thread Starter
Intermediate
Joined: Jun 2007
Posts: 49
Likes: 0
From: Cameron Park CA
Thanks for the info. I would rather do the work myself but a year ago I had back surgery and ended up with permanent nerve damage so my ability is limited. The previous owner was restoring the vehicle and finished a lot of the work. It is currently road worthy but there are some small issues to get it running tip top so those are he things I would like to do myself. I do appreciate any help I can get. Thanks again.
Steve
Steve
Thread Starter
Intermediate
Joined: Jun 2007
Posts: 49
Likes: 0
From: Cameron Park CA
I pulled the vac hose and the engine did slow down, does that mean that the vac advance is ok? I plan on doing a tune up and have a question about the spark plugs, do you have to get under the vehicle to reach them?
Melting Slicks
Joined: Nov 2000
Posts: 2,507
Likes: 114
From: St. Louis Mo
Well, lets just say that changing the plugs in a 79 Stock L-82 is not the easiest thing to do. Myself, Bullshark and a couple others spent a couple of hours changing the plugs in mine and these guys are not slouches. Yes for underneath, but you may be able to gain access through a wheel well..............GOOD LUCK..LT
Last edited by red topless gator; Jun 7, 2007 at 08:40 AM. Reason: spelling
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Thread Starter
Intermediate
Joined: Jun 2007
Posts: 49
Likes: 0
From: Cameron Park CA
Well, lets just say that changing the plugs in a 79 Stock L-82 is not the easiest thing to do. Myself, Bullshark and a couple others spent a couple of hours changing the plugs in mine and these guys are not slouches. Yes for underneath, but you may be able to gain access through a wheel well..............GOOD LUCK..LTSteve
Drifting
Joined: May 2006
Posts: 1,480
Likes: 2
From: Circleville Ohio
Vader Vette
Welcome to the forum. As you run into a problem or just a question, post it and everyone will try to help this is a great source of imfo as you read more posts you will catch on as to who to ask for what help anyway good luck on your car.