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

Vacuum delete

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Old Mar 9, 2018 | 01:07 PM
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Vacuum delete

hey y’all I’m wanting to delete most of my vacuum lines on 1986 f150 it has a 351 ho witch ones do I need to keep and witch ones can I do away with if possible can someone give a diagram thanks
 
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Old Mar 9, 2018 | 08:02 PM
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Originally Posted by Cooks86
hey y’all I’m wanting to delete most of my vacuum lines on 1986 f150 it has a 351 ho witch ones do I need to keep and witch ones can I do away with if possible can someone give a diagram thanks

Post a pic of your emmsions sticker. Only way to know what can go....
 
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Old Mar 10, 2018 | 12:11 AM
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You will need vacuum lines for vacuum advance distributor, brake booster, and PCV.
maybe some more for a/c, heater, vents and stuff.

If you are in California I think you need to keep everything.
 
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Old Mar 10, 2018 | 08:44 AM
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Originally Posted by 82_F100_300Six
You will need vacuum lines for vacuum advance distributor, brake booster, and PCV.
maybe some more for a/c, heater, vents and stuff.

If you are in California I think you need to keep everything.
X2 what he said.
Dave ----
 
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Old Mar 10, 2018 | 09:04 AM
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Deleting vacuum lines can head you out into the minefield really quickly.

Since you have the 351HO, it's safe to assume you are carbureted. I'm posting the emissions sticker from an 84 that I have, but it was a 2bbl carb. Probably the simplest vacuum diagram I've seen.

 
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Old Mar 10, 2018 | 11:47 AM
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From: St Albert, Alberta
Originally Posted by NotEnoughTrucks2014
Deleting vacuum lines can head you out into the minefield really quickly.

Since you have the 351HO, it's safe to assume you are carbureted. I'm posting the emissions sticker from an 84 that I have, but it was a 2bbl carb. Probably the simplest vacuum diagram I've seen.

Can't see too small but Canadian Calibration and I assume above 8600 GVW so no EVAP no EGR and no Thermactic.
If his is US Calibration and below 8600 GVW it won't be so simple.
 
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