1978 Ford Bronco burning rich

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.

Wednesday, April 29th, 2009 AT 5:58 PM

2 Replies

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

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