Notices
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

1994 F150 300cui inline 6 vacuum issue.

Thread Tools
 
Search this Thread
 
Old Yesterday | 07:15 PM
  #1  
Bogreaper's Avatar
Bogreaper
Thread Starter
|
2nd Gear
Joined: Jun 2026
Posts: 2
Likes: 0
1994 F150 300cui inline 6 vacuum issue.

I have the above truck, the guy I bought it from did some makes shift hose work and it's not right.

In the pictures you see the hose I have held up with a Y in it, those line suck IN, he had them on the palatium pictured under my hand, which also sucks IN. where do these hoses really suppose to be going?

Thanks peps.


eeee
 
Reply
Old Yesterday | 07:33 PM
  #2  
90project5.0's Avatar
90project5.0
Fleet Mechanic
Photogenic
Photoriffic
Community Builder
Community Influencer
Joined: Oct 2025
Posts: 1,914
Likes: 420


Is the red circle your vacuum diagram?
 
Reply
Old Yesterday | 08:48 PM
  #3  
Bogreaper's Avatar
Bogreaper
Thread Starter
|
2nd Gear
Joined: Jun 2026
Posts: 2
Likes: 0
Yes, but that is not working, the person I bought it from did some "Make Shift" vacuum line stuff, he actually had water line pvc pipe going from the air box to the the valve cover. Even going by that diagram on the inside of the hood it's not working. When I do that and I feel on the hoses, the connection is Sucking IN, and the hose is sucking IN, that does not make sense to me. one should be pushing and one sucking.

Or am I just over Thinking it?

I appreciate the help, just getting frustrated with this thing, I know it's something simple, just can't see it.

Thanks
 
Reply
Old Yesterday | 09:09 PM
  #4  
90project5.0's Avatar
90project5.0
Fleet Mechanic
Photogenic
Photoriffic
Community Builder
Community Influencer
Joined: Oct 2025
Posts: 1,914
Likes: 420
Originally Posted by Bogreaper
Yes, but that is not working, the person I bought it from did some "Make Shift" vacuum line stuff, he actually had water line pvc pipe going from the air box to the the valve cover. Even going by that diagram on the inside of the hood it's not working. When I do that and I feel on the hoses, the connection is Sucking IN, and the hose is sucking IN, that does not make sense to me. one should be pushing and one sucking.

Or am I just over Thinking it?

I appreciate the help, just getting frustrated with this thing, I know it's something simple, just can't see it.

Thanks
Nipples on intake should suck. The hose you attach to it will also suck on the opposite end where it attaches to. None will push.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Quitcrying
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
4
Mar 3, 2024 09:11 AM
Eduardo Arballo
1987 - 1996 F150 & Larger F-Series Trucks
7
Dec 28, 2023 04:17 AM
jghjunk
1997 - 2003 F150
3
Dec 5, 2023 01:10 PM
Elanham59
1999 - 2003 7.3L Power Stroke Diesel
23
Oct 23, 2021 02:02 PM
Jbudd
1987 - 1996 F150 & Larger F-Series Trucks
4
Nov 1, 2020 04:17 PM




All times are GMT -5. The time now is 04:58 AM.

story-0
10 Ways Ford is LOSING to the Competition

Slideshow: 10 ways Ford is losing to the competition

By Joe Kucinski | 2026-06-15 09:52:01


VIEW MORE
story-1
Top 6 Best Deals Available on New Fords & Lincolns Right Now

Some great targets in today's expensive world.

By Brett Foote | 2026-06-15 09:35:19


VIEW MORE
story-2
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-3
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-4
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-5
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-6
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-7
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-8
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-9
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE