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

Vacuum Diagram Woes

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Old Jul 27, 2007 | 04:54 PM
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Vacuum Diagram Woes

I have a 1986 F250, Automatic, 2WD, with the 5.8 Windsor Motor. I purchased it used, and in very poor condition. I have since gotten it running well, cleaned up the body, and would like to finish the tune up, but the vacuum diagram does not seem to match what I have under the hood. It seems that there aren't enough ports on the carburator to accomadate what the schematic has going in or coming out. To the best of my knowledge, it is the stock carb. Any thoughts?
 
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Old Jul 27, 2007 | 09:16 PM
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If it runs well, I would leave the vacuum lines off. Bare minimum you need one to the distributor(if you don't have a computer), one to the tranny, one to the HVAC, one to the brake booster, and one to the PCV valve.
 
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Old Jul 28, 2007 | 12:19 AM
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Post the carb numbers to verify.
 
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Old Jul 28, 2007 | 02:14 PM
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It has 80457-2 stamped on the throat, with 1180 stamped just underneath that. The Holley website lists that as carb model 4160. Its supposed to be a 4180, isn't it?
 
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Old Jul 28, 2007 | 04:06 PM
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That obviously isn't the original carb.

That's why nothing mates up like you say.
 
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Old Jul 29, 2007 | 06:11 AM
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So I'm right in assuming that its the wrong carb? The Holley website has very little info on it; there's almost no mention of the 4180 whatsoever
 
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