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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

idling trouble

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Old Jun 20, 2010 | 04:04 AM
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shortblock2000
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idling trouble

My 1986 ford f150 carbureted 351w idling high. I adjust the idling on it to normal idle speed. but next day It idling too high again. The idling screw is not moving back I dont think. What is causing this? Does anyone have photos of this holley4bbl4180 I have on this truck. Where are the lean and rich adjustment screws located? How do I set the card if too rich mixture? step bt step details please?
 
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