what is the best way to adjust the air/fuel rato on a 2100 motorcraft carbutor without taking it to a tune up?

Answer 1

This is one of those things that if you need to ask, you may not want to mess with it. To adjust the mixture can throw off other settings and you will end up taking it in. Carburetors should be left to mechanics that have the training and expertise.

Answer 2

Except for the two idle mixture screws located at the base of the carburetor on the base plate, the mixture isn't otherwise adjustable except by virtue of the choke plate coming on (closing) during a cold start. You can take the top off the carburetor and change the fuel jets in the bottom of the fuel bowl and possibly adjust the float to specifications too. Maybe the float has become saturated with gasoline as often happens on older carburetors, so try rebuilding or exchanging with a known good carb from Edelbrock or Holley.

http://www.aa1car.com/library/carburetor.htm

Answer 3

You shouldn't try to adjust it, it was set at the factory. What kind of car is this on????? Maybe the innards of the carb are dirty, or maybe the accelerator pump diaphragm has a hole int it. If you suspect trouble with carb, remove the carb and take it to carb rebuild shop, if you don't want to do it yourself. Their are rebuild kits for these available. One thing that works the best to clean out muck in old carburetors is found at a Mercury boat store. It is called "Power Tune". For $10 or so, you can spray this chemical down into the working parts of your carb and it will practically rebuild it for you. It foams all the varnish and goo out and burns it through tailpipe. Use it with engine running, it cleans piston tops and rings, valve contacts and stems, and intake systems all at the same time!!!! Follow it iwth a Gum-out chaser. You'll be amazed! Good Luck!!!!