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carb problems

jaybyrd66

jaybyrd66

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crossville TN
ok everybody, got a lil question here, ive got a mostly stock 350 with a 292 cam and a 600 edelbrock with elec. choke. the carb is only like 3 months old. my problem is that once my truck reaches around 180 to 190 deg. it starts wantin to flood and dont really wanna run and if i shut the truck off its a bitch to get started again, it will crank and crank for like 10 or 15 seconds before it will finally start and will flood the hell out of itself. but while the truck is only up around 160 or cooler it runs like a dream. now the question is do yall think its somethin with the carb or could it possibly be the mogule (or however you spell it lol) in the distributor tryin to cut out once it gets hot or something, or maybe something else in the distributor or what? any thoughts appreciated.
 
Hard to tell , But In My Experience if the Module or magnetic pickup try to fail due to heat They Usually Die completlly , & not Restarts untill after being cooled down for awhile . Not saying its Imposablle, But I dont think it would cause the Flooding issue .

So I Would think The carb is the Problem , Poablly had some Crap get in it thru the fuel system causing the Problems . Just My guess, but thats where I,d look if it was Mine, Best of luck, & Hopefully someone else will Help out as I Dont keep up that much on the Newer stuff these days, :eek: . Bob
 
It sound like you may have all of the symptoms of a phenomenon called heat soak percolation. This usually occurs when the engine is stopped during warm weather or after it has been run long enough to be fully warmed up. In this case, insufficient cool air is blown over the engine. Heat stored in the block and exhaust manifolds is radiated and conducted directly into the carburator, fuel lines and fuel pump. Fuel in the main system between the the fuel bowl and the main discharge nozzle can boil. Vapor bubbles push or lift fuel out of the main system into the venturi. Fuel falls on to the throttle plates and runs down into the intake manifold. This can cause the flooding you describe. Percolation is aggravated by fuel boiling in the fuel line to the carburator creating fuel pressure as high as 18 psi.The needle may be forced off the seat causing the level in the bowl to raise. Try putting a insulating spacer or a metal heat shield between the carb and the intake manifold.
 
drabo said:
Might try looking at the choke settings.
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dido, sounds like the choke is staying on, once its warm disconect the wires to the choke, pull off the air cleaner, start it up and see if carb is still choked.
 
tried everything i could think of, i even unplugged the choke for a couple days to just totally bypass it for a lil bit and it didnt change a thing. i ended up just selling it and buying me a HOLLEY. problem solved :D
 
LEYLAND said:
Good call. I love my Holley
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well not so sure if its a good call or not yet, havent even really got to see how good it will run, put the new carb on and headed to the store to fill er up and got a load of water in my gas, havent got it all out yet so ive still not seen its full potential. damn the luck!:(
 
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