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Climate Control gone Screwy 

 

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Posted: Thu Jan 26, 2006 2:12 pm 
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data_mine wrote:
madmax wrote:
I also have this problem, however I don't believe I have any vacuum leaks.
check valve works and heater vacuum line holds vacuum over night.
Problem only occurs when towing trailer up long hills. Whithout load there is no problem.

Currently waiting for Supercrap to order in 10mm- 6mm reducing T piece, then vacuum for heater controls will be connected to 10mm vaccum line that goes to brake booster. If this fails I will be installing a vacuum pump to the heater controls and seperate them from the engine.

see http://www.fordmods.com/phpBB2/viewtopic.php?t=21796


That's normal. under load, the engien produces no vacuum, so you'll "run out" of vacuum (the vacuum system isn't perfectly sealed), until you're cruising again (light load).


Thats a relief, so I don't have a actual problem, just a design flaw. So adding a vacuum pump to either supplement the heater controls or to run them independantly would be an ideal fix.

 

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Posted: Thu Jan 26, 2006 3:43 pm 
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yeah, but is it really that much of a problem. KNock the car back a gear when going up hill, and it'll be fine.

 

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Posted: Thu Jan 26, 2006 6:14 pm 
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Over the years with vacuum systems on fords and other cars (mercedes etc) I have found that the ONLY thing to really cause this problem is either a leaky one way valve or a heater tap line brokrn or split. I tow heavy loads up long winding hills without having a problem except as stated previously. :roll:

 

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Posted: Thu Jan 26, 2006 6:46 pm 
Getting Side Ways
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GTBob wrote:
Over the years with vacuum systems on fords and other cars (mercedes etc) I have found that the ONLY thing to really cause this problem is either a leaky one way valve or a heater tap line brokrn or split. I tow heavy loads up long winding hills without having a problem except as stated previously. :roll:


A year or 2 ago I did have a leak at the heater tap. Back then the vents would switch to the screen immediately the accelerator was pressed.
This time I don't think I have a leak, as the heater vacuum line will hold vacuum overnight, and the problem only occurs when I have a trailer behind me and a steep hill to climb.

 

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Posted: Thu Jan 26, 2006 11:50 pm 
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GTBob wrote:
I tow heavy loads up long winding hills without having a problem except as stated previously. :roll:


Same... Never had any problems... Only time I've ever had any problem is when the one way valve was broken, and Ford replaced it under warranty, after I had the exact same problems.

Its possible that testing the valve by normal methods may not tell you if its actually rooted, unless you have a decent vaccum pump.
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Posted: Fri Jan 27, 2006 8:36 am 
Getting Side Ways
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Well I guess it wont hurt to replace it. They are only about $6.50

 

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