GM B-Body Forum
- Posts : 680
Join date : 2013-01-14
Age : 24
Location : Flint/Detroit, MI - Charlotte, NC
To me its just a carb thing, every carbed vehicle ive ever drove has always done some sort of hard start after warm some worse than others. But then it could be different in your situation, like the choke could start closing after about 10-15 mins. Usually thats about the same time the fuel gets "heat soaked" or sometimes can "boil". Mine does it all the time, it did it with the original quadrajet, the two holleys i put on, the cheap summit racing brand carb i used, and finally on my latest, a quick fuel carb. The better you can get it tuned, and timing plays a role too, the better it will act but again it wont fire up like fuel injection would.
What you have to do is learn the car, and feel it, i know when i let mine site for roughly that same amount of time mine it will have a hard time starting, thats if i dont touch the pedal. but i also dont pump the pedal since its already warm, i just lightly open the throttle and it usually fires up real quick just like it would if it was cold. Those are some of the quirks you get with a carbed car but wouldnt trade it for the world.
1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
1984 Caprice Sedan, 305 motor, 700r4
1978 Caprice Sedan, 305 motor, th350
1993 L99 Caprice, 4.3 v8, 4l60 trans
1972 Ford F-100, 302 windsor, c4 trans
2001 BMW E46 330i, 3.0L