New Carb installed
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New User
Joined: Apr 2004
Posts: 6
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New Carb installed
I just bought a remanufactured carb for my 79 f 100 302 engine..I has made a difference while running however..I know it needs some adjusting..Is it possible to adjust this your self without having to go and hire someone to do this? labor rate is 55-75 bucks an hour..yikes..I have a Haynes manual but it recomends a tachometer... sigh..sounds like a expensive tool and I wouldnt even know how to use it anyway..maybe I am better off hiring someone to do this..I know where the idle screw is and I saw another screw below the fuel intake.. I also have plugged the extra ports that are not in use...I have already replaced the filters,plugs,wires,cap and rotor but the carb just seems to run rough..any suggestions?
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Joined: Feb 2004
Posts: 1,388
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From: Saratoga, NY
You can try backing out both mixture screws about 1/4" at a time to see if it smooths out. These screws are found on the front of the carb if I remember. If it runs rougher turn them in and see if it gets any better. (out=counterclockwise, in=clockwise) If this doesn't work you might have a vacuum leak someplace, like the carb gasket.
As far as a tach is concerned what is expensive to you? I would rather use a vacuum gauge for this, when it is hooked up and running adjust the screws until you obtain the highest vacuum reading.
As far as a tach is concerned what is expensive to you? I would rather use a vacuum gauge for this, when it is hooked up and running adjust the screws until you obtain the highest vacuum reading.
