Stalling
Thread Starter
4th Gear
Joined: May 2023
Posts: 4
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Stalling
I have a 1980 L48 4 spd c3. The car idles good runs good but sometimes after hard acceleration it will start to run rough and stall out. After I let it sit it is fine again. Any ideas on why this would happen.?? Appreciate any advice!
Team Owner
Joined: Jan 2007
Posts: 53,648
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From: Southern Cal Ca
St. Jude Donor '22
not just the sitting but rough running stuff
welcome newb
Thread Starter
4th Gear
Joined: May 2023
Posts: 4
Likes: 0
It runs great under normal driving conditions. No issues at all until I really hammer on it. Then it starts to sputter like it’s not getting fuel then it will die. It’s then hard to start and I have a tough time keeping it running. Once it sits for 15 or 20 mins it starts right up and is back to running fine.
Team Owner
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
better.
a few things come to mind.
next time it happens, look down carb throat, front barrels, move throttle and look for streams of gas.
this could show if carb is out of gas.
a few things come to mind.
next time it happens, look down carb throat, front barrels, move throttle and look for streams of gas.
this could show if carb is out of gas.
Is my vette stock?? HAHA
Joined: Oct 2015
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
when you accelerate hard, does it sputter right away? Is it a holley or a Quadrajet? If its a Holley your front float could be set high and you are flooding it as the fuel sloshes up into the vent. If it stalls after you come to a stop it would be low float level.
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Melting Slicks
Joined: Dec 2009
Posts: 3,195
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From: Thunder Bay
I think most of us are of the opinion that it is a fuel starvation problem, but this is what you need to do to be sure. Then you can start looking for the cause.
Advanced
Joined: Apr 2016
Posts: 92
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I had a similar issue and it was my mechanical fuel pump. I would work well enough at idle and under normal acceleration. Whenever I punched it would stutter and then stall. Figured it out by watching the clear fuel filter while in neutral and someone punching the gas. Could see the filter go empty and then it stalled.
