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Engine stalls when engine is warm?

Tiny
HAVM
  • MEMBER
  • 1966 CHEVROLET CHEVELLE
  • V8
  • 2WD
  • MANUAL
  • 1,000 MILES
I recently picked up the car listed above with a 454 BB bored over 60 with an 850 CFM carb and a tremec 5 speed transmission. I've noticed that once my engine is warm, when I come to a red light or a stop my engine starts to stutter and shuts down unless I keep my foot on the gas. I've had my carburetor adjusted and my mechanic replaced some needles but I continue to have this issue. When my engine is warm it runs around 180 degrees.
So far, I've replaced my fuel pump, installed a new gas tank and sending unit and had my carbs looked at and adjusted. I can't figure out what's causing the engine to shut down. Any ideas?
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Wednesday, June 19th, 2024 AT 8:54 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
It sounds like you may have a vacuum leak, have you tried to see if any of the vacuum caps at the base of the carb are missing, this can happen if the engine backfires. Here is a guide you can use with the engine cold to see if you can find the leak:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

This guide may help as well:

https://www.2carpros.com/articles/stall-at-idle

Please upload videos in your response of any problems so we can see what to help you with.
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Wednesday, June 19th, 2024 AT 7:03 PM

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