Started, ran fine. Restarted and kept cutting out -
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 3,280
Likes: 0
From: Virginia Beach Virginia
Started, ran fine. Restarted and kept cutting out -
My '75, ZZ4, A/T has been in hibernation (if we can say that in Virginia) and I started it this weekend without any problem. I let it run for 5 minutes in the driveway then took a quick (<5 min) spin around the block. I pulled into my driveway and cut it off and did some cleaning of the Vette's space in the garage. 15 minutes later, she started right up but required me to keep revving to keep it from cutting off. When I'd put it in drive, it'd immediately die during the shift from P to Drive (3). Any guesses as to what could be causing this?
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
Spark plug came off...bad gas, not getting enough fuel... choke not working, sticking and shutting down....not knowing the ignition you have...it can be ignition related...not knowing the RPM's...it can be a vacuum hose came off. It is hard to comment without very detailed information....unless all you have for information is all you can provide.
DUB
DUB
Racer
Joined: Jul 2009
Posts: 344
Likes: 5
From: oak harbor wa
similar to mine
This same thing happened to me sort of. I changed the plugs and wires, and put freah gas after a 9 month sitting time while I was on deployment.
I drove it about a 3 mile trip came back and it was breaking up bad kept having to pedal it to get to stay running. I thought it was the ignition module but it turned out to be the coil. If you have a multimeter you can test both. The specs will be different on name brand.
I drove it about a 3 mile trip came back and it was breaking up bad kept having to pedal it to get to stay running. I thought it was the ignition module but it turned out to be the coil. If you have a multimeter you can test both. The specs will be different on name brand.
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 3,280
Likes: 0
From: Virginia Beach Virginia
Spark plug came off...bad gas, not getting enough fuel... choke not working, sticking and shutting down....not knowing the ignition you have...it can be ignition related...not knowing the RPM's...it can be a vacuum hose came off. It is hard to comment without very detailed information....unless all you have for information is all you can provide.
DUB
DUB
1) Gas - High potential since I've only started it a few times in the last few months. However, if it's the gas, I wonder why it ran for the first few minutes without a problem. I also wonder if the gas had gunk it in and clogged up the jets in the carburetor. If gunk got stuck in the primary jets, maybe that's why when I rev the engine it still runs?
2) Choke Sticking - This is very possible. Before shutting down the car, I revved it just a little bit, maybe up to 3000 RPMs.
3) Blown vacuum hose, potentially to coil --- maybe. Will need to check.
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 3,280
Likes: 0
From: Virginia Beach Virginia
This same thing happened to me sort of. I changed the plugs and wires, and put freah gas after a 9 month sitting time while I was on deployment.
I drove it about a 3 mile trip came back and it was breaking up bad kept having to pedal it to get to stay running. I thought it was the ignition module but it turned out to be the coil. If you have a multimeter you can test both. The specs will be different on name brand.
I drove it about a 3 mile trip came back and it was breaking up bad kept having to pedal it to get to stay running. I thought it was the ignition module but it turned out to be the coil. If you have a multimeter you can test both. The specs will be different on name brand.
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Keep in mind that when you start these cars, they should be taken out and fully warmed up. Backing them in and out of the garage or going short distances will foul the plugs since the choke is on dumping lots of gas into the cylinders. This can also create condensation in both the engine and exhaust system which can have damaging effects. Ask me how I know...
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 3,280
Likes: 0
From: Virginia Beach Virginia
Keep in mind that when you start these cars, they should be taken out and fully warmed up. Backing them in and out of the garage or going short distances will foul the plugs since the choke is on dumping lots of gas into the cylinders. This can also create condensation in both the engine and exhaust system which can have damaging effects. Ask me how I know...
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
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Thread Starter
Melting Slicks
Joined: May 2000
Posts: 3,280
Likes: 0
From: Virginia Beach Virginia
Hard to believe but the problem is back -- I have a new theory. I noticed that my alternator belt is loose. Is it possible that the belt is so loose that it's not recharging the battery? I'm not really buying that because why would the battery recover after sitting for a few hours?