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Re: 1963 Carb Flooding Problem
with the top off and upside down on the bench apply 5/6# of air pressure to the fuel line connection and use a soap solution around the needle/seat where it attaches to the carb top. i have seen that the gasket used there in carb kits have too large a inside diameter and cause a fuel leak there. check the "float drop" spec also -
Re: 1963 Carb Flooding Problem
In addition to what Clem say's, make sure the floats don't bind in the body when they are moved up/down. What is fuel pump pressure, book say's 5 1/4 to 6 1/2? Hesitation is vacuum leak or acellerator pump circuit, be careful here because pump works hand in hand with float level, if the floats are set too low the pump will push air first and result in hesitation.
Do you have the proper gaskets and heat shield and did you plug the small heat slot holes in the intake manifold as this will make a huge difference in carburetor temperature and may make things a little easier to troubleshoot(you will be able to eliminate fuel perculation).
I am chasing my own gremlins with a 3461S but I believe my problem lies with wore throttle shaft so it's off to the carb restorer for me, I can't afford any more gaskets! Sorry for the long post, TimComment
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Re: 1963 Carb Flooding Problem
Tim,
Is your throttle shaft bore wear giving you variable idle? Try this if you haven't shipped out the AFB yet.
Only the most inner length of the throttle shaft bore, directly under the fuel bowls, is a close fit. The outer portions of the shaft bore are clearanced 1/32" over. I fashioned my own bushing liners out of 0.015" thick teflon sheet and lined the outer ends of the bore in the throttle body. Now she comes back to the same RPM every time.
Cheap, effective, and no reamer required.
Chris.Comment
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Re: 1963 Carb Flooding Problem
Chris,
My problem with the 3461S is that the car idles about 750-800 RPM with the stop screw backed all the way out and butterflys closed. Can't get it to idle low (500 RPM) I have checked everything and had local carb rebuilder overhaul also. Vacuum at idle 18" to 19", car runs nice but spark plugs show black soot. I think there is internal vacuum leak (throttle shaft) and finding gas somewhere but just enough to make car run at that idle RPM so it must be slight.
Only other thing is that someone modified this carb with some hot rod trick for big cam and I can't figure out what was done. This is a swap meet carburetor but I can't give up because correct # and date.Comment
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