The Pontiac GTO !

armyadarkness

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I can't think of any instance where the cold idle was lower in RPM than standard idle.
No matter what the vehicle. Good luck!
Mine always does it. When starting it after it has been sitting off for 5-10 minutes, it idles like a top fuel dragster! Very low and lopey idle. But drive it for 5 minutes and then it idles like a swiss clock at 800 rpms.

Pontiacs do suffer unusual heat soak issues, but Im just guessing why its happening.
 

armyadarkness

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once the carb is set you may have to play with the timing. i wonder if the carb is not filling up enough?when it sits the fuel could be evaporating. and not feeding it correctly until it fills the bowls to a certain level. as you say shes a thirsty girl.
Mine didnt do it until I fixed the exhaust leaks... So, it might be the leaner idle mixture settings
 

ponchonlefty

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my firebird does the same thing. i always thought it was because i don't use the choke. two things that they have in common are the edelbrock carbs and pontiac engine. my brother had a 65 chevy truck with a 454 and holley carb and it didn't do that. we put a 274 comp cam in it and it still didn't. it would start right up and run the same cold or hot.
 

Jim C

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@Jim C

Might be your opportunity to join the elite! Needs work, but seems priced right. If you buy it for $15,000 and put $15,000 into it, you'll have a $60,000 car
I think I'm more interested in a retro mod for $60K that someone spent a $100K to build!
Really though, maybe one more old car that was reasonably clean, a driver, that didn't need anything.
Preferably another 70' Chevelle with an LS swap. I like GTO's and old Mopars too but not with original front drum brakes.
 

Jared

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I think I'm more interested in a retro mod for $60K that someone spent a $100K to build!
Really though, maybe one more old car that was reasonably clean, a driver, that didn't need anything.
Preferably another 70' Chevelle with an LS swap. I like GTO's and old Mopars too but not with original front drum brakes.
Brakes should be the first upgrade on any old car you plan to drive. Mine had front drums and they were down right scary. I swapped the fronts for Wilwood disc that fit under 15 inch wheels. Night and day better. I kept them as manual brakes so that I wouldn’t ever have to worry about too little vacuum being an issue.


This is several years after the swap. Rotors still look great



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