CRUISE CONTROL DEAD
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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?
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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?
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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.
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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
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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.
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Joined: Sep 2008
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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...
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