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Discussion Starter · #1 ·
Question about new install, I just built a 383 stroker, put in new transmission, new wiring from scratch etc. starts like a champ at a cold start or if I shut it down and re start it within 1-2 minutes if it sits for 5-8ish minutes it takes quite a few cranks to get it to start then when it does it barely idols then it finally clears up. I have never had an issue like this I was hoping someone can shed some light on this, I know I did not include a ton of info because I know there will be questions.
thanks in advance.

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Welcome to the forum, glad to have you here, sounds like carb is leaking fuel thru needles and seats, or a leaking internal gasket, in a sense flooding it. What carb are you running..? sign0016
 

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Welcome to the forum, glad to have you here, sounds like carb is leaking fuel thru needles and seats, or a leaking internal gasket, in a sense flooding it. What carb are you running..? sign0016
Thanks for having me. I am running a Holley 4160. I was having the same thought on carb leaking. I checked my fuel bowls after it sitting for 3 days and they are still full, if there was a leak wouldn't it be empty or less fuel in bowl?

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When you first shut it down after driving it or its warm, the pump will hold a certain amount of pressure, the float needles will let the pressure push the fuel past them, next time you shut it down warm, remove air cleaner use a flashlight to peer down in the throttle bores to see if fuel is dribbling down or if the manifold is extremely wet.
I had an issue just like this and I just replaced the needles and seats on a 4150 holley, but it was the rear seat that had the issue, turned out after removing the bowl when I installed the new needles a piece of flashing from the threads had broken off and stuck into the neoprene seat just enough to allow it to weep until the pressure bled off..
 

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Discussion Starter · #7 ·
I appreciate all the comments I will replace the needle and seats and let you know how it turned out.

The fuel pump gets turned off when the ignition gets turned off, but a good thought.

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Welcome to the forum, glad to have you here, sounds like carb is leaking fuel thru needles and seats, or a leaking internal gasket, in a sense flooding it. What carb are you running..? sign0016
After replacing the needle and seats and if it still has an issue, you mentioned an internal gasket how could I tell? I sure believe in quality of workmanship has gone down, this carb only has 3000 miles on it.

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After replacing the needle and seats and if it still has an issue, you mentioned an internal gasket how could I tell? I sure believe in quality of workmanship has gone down, this carb only has 3000 miles on it.

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Before you replace any thing when the engine is shut off after it has run, look down into the carb too see if it is wet, ( the tops of the throttle plates and or the bottom of the intake under the carb ) it could also be that you are cooking the carb, excess heat pushes the fuel past the floats and or gaskets as well.
 
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