Originally Posted by zoc65
i'm a newbie so i've got an easy one...i've got a 400 with duel edelbrock carbs (elec. choke), it has been sitting for about a year. i've done all the basic stuff, fresh gas, some carb cleaner. it takes a while to get it to start cold. it will crank maybe 6-10 times before it will turn over. once it gets going it runs great. it will start right up again no problem if it is still warm. but if it sits again for a few days, it takes awhile to start it again. any ideas where i should start? thanks in advance.
Two things to check, they go in opposite directions. Check the cold choke setting, either to tight which nets too much fuel not enough air, or too open which nets too much air not enough fuel.
After it sets awhile without use, the fuel is escaping the float bowls, evaporation or leakage. The engine than will be reluctant to fire till the fuel pump refills the bowls. There are two symptoms with this.
- First if evaporated, cranking is usually accompanied by brief a light off from the accelerating pump if you push the pedal a couple times then nothing. This is usually from the carb cooking on a hot engine, boiling the fuel out to the surrounding atmosphere. An insulator between the carb and manifold usually stops this kind of problem.
- Second, if the fuel is draining into the engine it may prove to be rich till cranking clears the excess out, then it will light off. This is usually the result of either fuel boiling off as above but then running into the engine from the bowl vent. Or draining from the bowl into the engine thru a crack, loose part, or break in the carb leading into the manifold.