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1987 - 1996 F150 & Larger F-Series Trucks
Vacuum line location?

1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Vacuum line location?

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Old

Nov 9, 2025 | 05:24 PM

#1

SK5K

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3rd Gear

Joined: Nov 2025

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Vacuum line location?

Where is this vacuum line supposed to go?

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Old

Nov 9, 2025 | 06:09 PM

#2

My4Fordtrucks

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Joined: Jun 2015

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What are you working on? Is the vacuum diagram attached to the air box lid or on the bottom of the hood?

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Old

Nov 9, 2025 | 06:12 PM

#3

SK5K

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3rd Gear

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Wasn't really working on anything, just bought the truck and noticed it was disconnected and can't figure out where it goes. I do have the diagram but still can't tell.

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Old

Nov 9, 2025 | 06:39 PM

#4

90project5.0

Fleet Mechanic

Joined: Oct 2025

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Year, model and engine is what he’s asking for.

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Old

Nov 9, 2025 | 06:41 PM

#5

SK5K

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3rd Gear

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🤦 sorry. 5.8 in a 92 f150.

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Old

Nov 9, 2025 | 06:50 PM

#6

90project5.0

Fleet Mechanic

Joined: Oct 2025

Posts: 1,725

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Looks like it’s either that TAD or TAB hose. There are vacuum diaphragms behind the engine. It goes to the one that doesn’t have a vacuum hose attached. Follow the yellow one, that will tell you the area to look.

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