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1978 Ford Bronco burning rich

Tiny
FOUST61
  • MEMBER
  • 1978 FORD BRONCO
  • V8
  • 4WD
  • AUTOMATIC
  • 80,000 MILES
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.
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Wednesday, April 29th, 2009 AT 5:58 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the choke plate opening could be sticking and the fast idle cam adjustment
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Thursday, April 30th, 2009 AT 1:26 AM
Tiny
ATKAPARKING
  • MEMBER
  • 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.
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Thursday, April 30th, 2009 AT 10:44 AM

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