Question about 1981 Ford Bronco
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Adjust the curb idle with the engine warmed up and the choke off.
The air/fuel mixture screws should be adjusted with the engine warmed up and at normal idle speed, then turn each air/fuel mixture screw in one at a time until the engine just begins to mis-fire, then back the air/fuel mixture screw out 1-1/2 to 2 turns out a half a turn at a time until the engine idle is the smoothest. (your vehicle might have restrictor caps over the air/fuel mixture screws to limit the amount of adjustment)
To adjust the vacuum tension pull on the choke pull-off:
Adjust the fast idle screw to the proper RPM with the engine cold and the choke on.
Posted on Aug 01, 2010
Testimonial: "Thank you so much, where were you 2 months ago. lol. Do you maybe know anything about olds 3.8 engines?"
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Posted on Jan 02, 2017
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