Notices

Vacuum leak

Thread Tools
 
Search this Thread
 
Old Jun 11, 2003 | 05:39 PM
  #1  
lake13's Avatar
lake13
Thread Starter
|
New User
Joined: Jun 2003
Posts: 2
Likes: 0
Vacuum leak

I have a 1999 with 150K mi. Just recently it started running real rough. After changing the fuel filter and pump I had AutoZone test it and they determined that it has a vaccuum leak, but no leads as to where.

Best I can tell, I've got two clues 1) When I shift into 2nd and get the rpm's up, it runs fine. 2) At the same time (in 2nd) the air flow switches from the a.c. vents to the defroster vents.


I know it's not much to go on, but does anyone have a clue as to where I should start checking? confused:
 
Reply
Old Jul 10, 2003 | 01:27 PM
  #2  
stevesinger's Avatar
stevesinger
Junior User
Joined: Jun 2003
Posts: 86
Likes: 0
From: Kentucky
Vacuum leak

Lake, do you live in a northern climate where they use a lot of salt? If so you might want to check the vacuum canister. They will rust and have pin hole leaks. I have had this before and replaced it and the problem is fixed. The whole idea of the canister is to maintain enough vacuum for instances where you cannot generate it on the fly.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
hammerhead90
Explorer, Sport Trac, Mountaineer & Aviator
8
Aug 10, 2010 08:55 PM
GraysF250
1999 - 2016 Super Duty
10
Jun 6, 2010 09:46 PM
ASH
1987 - 1996 F150 & Larger F-Series Trucks
53
Jun 29, 2004 04:20 PM
lake13
Modular V8 (4.6L, 5.4L)
2
Jun 12, 2003 09:19 AM




All times are GMT -5. The time now is 04:31 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-9
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE