1978 Ford Bronco burning rich

1978 FORD BRONCO
80,000 MILES • V8 • 4WD • AUTOMATIC
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FOUST61
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  • 1 POST
my bronco has sat for a long time with out being driven so there are some problems. the one i want to solve is the carb. it needs adjusted. the things burns really rich. I know my grandfather didnt change anything but the oil and shocks so im assuming its the stock carb.
Apr 29, 2009 at 5:58 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the choke plate opening could be sticking and the fast idle cam adjustment
Apr 30, 2009 at 1:26 AM
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ATKAPARKING
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  • 64 POSTS
There is also an air-fuel mixture screw at the base of the carburetor--this should be run in until it gently seats, then backed out 2 and 1/2 full rotations. I assume you have installed new spark plugs and cleaned cap/rotor as well as checked timing--all these can cause a rich condition as well. Be sure to grasp the throttle shaft where it goes through the carburetor and wiggle to check for free play--on older carburetors, the brass bushings wear out.
Apr 30, 2009 at 10:44 AM
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