CRUISE CONTROL DEAD
Thread Starter
|
Posting Guru
Joined: Aug 2006
Posts: 1,049
Likes: 0
From: Perry Georgia
CRUISE CONTROL DEAD
My truck, a 1987 F250 N/A Diesel, lost the cruise control about a week ago. Everything else works but the cruise. I checked the fuses and they all were good. I remember a post about losing the cruise but can't seem to find it. The cruise has always worked and it is a pain to try and keep the same speed cruising down the highway not to mention having to watchout for the radar. Any ideas where to start?
Senior User
Joined: Mar 2010
Posts: 105
Likes: 0
Posting Guru
Joined: Sep 2008
Posts: 1,840
Likes: 1
From: On the prairie
so i have to ask, whats the purpose of the vaccum canister? it seems that from the vaccum "distributer" one hose comes off and then to a "T" where one end leads to the canister and the other to the cruise control. Why does the cruise need a vaccum canister?
Cargo Master
Joined: Feb 2010
Posts: 3,493
Likes: 3
From: NY
Trending Topics
Moderator
Joined: Jan 2001
Posts: 56,979
Likes: 2,734
From: Virginia
On a gas engine they use a canister with a check valve in the line, because when a gas engine pulls a hill, it loses vacuum and it would cause the cruise to lose speed and then drop out. Same for the HVAC system, they use the canister to keep the heater from going to defrost each time you pulled a hill.
With the diesel and it's constant vacuum source(the pump) I am not sure why, unless it's used as storage if the small vacuum system we have did not have enough volume to initially apply the cruise diaphragm. That's purely a guess though.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Posting Guru
Joined: Sep 2008
Posts: 1,840
Likes: 1
From: On the prairie
Well at any rate I checked out that canister and sure enough it was rusted out. Imagine, rust on my truck
. Low and behold cruise works... BTW: I stole a replacement canister from my 78, identical part, no kiddin...
. Low and behold cruise works... BTW: I stole a replacement canister from my 78, identical part, no kiddin...
i ain't rite
Joined: Mar 2005
Posts: 65,467
Likes: 5,534
From: Marlboro Mental Hospital.
On a gas engine they use a canister with a check valve in the line, because when a gas engine pulls a hill, it loses vacuum and it would cause the cruise to lose speed and then drop out. Same for the HVAC system, they use the canister to keep the heater from going to defrost each time you pulled a hill.
With the diesel and it's constant vacuum source(the pump) I am not sure why, unless it's used as storage if the small vacuum system we have did not have enough volume to initially apply the cruise diaphragm. That's purely a guess though.
With the diesel and it's constant vacuum source(the pump) I am not sure why, unless it's used as storage if the small vacuum system we have did not have enough volume to initially apply the cruise diaphragm. That's purely a guess though.
Posting Guru
Joined: Sep 2008
Posts: 1,840
Likes: 1
From: On the prairie
That can't be it, mine was rusted completely and my heater controls worked great, meaning they didnt change around on me when I used the brakes. Maybe for laughs I'll clamp of the line to the canister and see what the cruise does. Has to wait till tommorow though...
Thread
Thread Starter
Forum
Replies
Last Post
