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13-05-2021, 04:08 PM
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#1 | ||
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Regular Member
Join Date: Apr 2010
Posts: 46
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Ever had problems with the A/C Vacuum Distributor Valve (behind the dash).
Mine functions perfectly when motor cold but after driving 10 klms it then directs 50% of the air flow to the windscreen (something within the valve changes). Can not get a replacement from Fords or EBay. So if you experienced same problem what did you do ? |
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13-05-2021, 04:46 PM
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#2 | ||
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RS The Faster Fords
 
Join Date: Feb 2014
Location: Westralia
Posts: 1,694
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Is it a 2 litre or a six?
Ford air cons from that time shared a few parts between models, you maybe able to expand the search to Escort and Falcon. Got a part number?
__________________
Escort RS2000 Restored factory a/c and alloys. TD Cortina Unrestored 35 000km 6cyl manual. Mk1 GT Cortina Project. FG XR50 Daily. |
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17-05-2021, 09:33 AM
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#3 | ||
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Regular Member
Join Date: Apr 2010
Posts: 46
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Thank you for your response will enquire from Fords if the Cortina part number which is Basic Part Number 19B919 and Aust Part Num YH24 are the same for Escorts and Falcons.
Should have mentioned that this is a 6 cyl xflow |
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05-06-2021, 11:14 AM
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#4 | ||
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FF.Com.Au Hardcore
Join Date: Jul 2013
Location: Brrisbane QLD
Posts: 1,184
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Air to the windscreen is the default flow when there's not enough initial vacuum. It might be something as simple as a a split vacuum line in the engine bay getting warmed up and leaking worse when soft and warm.
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03-07-2021, 06:06 PM
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#5 | |||
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Regular Member
Join Date: Apr 2010
Posts: 46
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Quote:
Do you do vacuum analysis ? Rgds Reno |
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04-07-2021, 09:03 AM
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#6 | |||
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FF.Com.Au Hardcore
Join Date: Jul 2013
Location: Brrisbane QLD
Posts: 1,184
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Quote:
I know about dash operations functions etc. The leak will be most likely in the engine bay where the main vacuum feed is, or sometimes the vacuum control switch in the dash could be the culprit. Listen for hiss sound, (with engine running). |
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21-07-2021, 06:58 PM
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#7 | ||
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Regular Member
Join Date: Apr 2010
Posts: 46
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Your advice is appreciated
Thanks |
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21-07-2021, 07:47 PM
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#8 | |||
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FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Perth, Northern Suburbs
Posts: 5,011
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Quote:
Does it change with throttle-position? My XF used to shift to the floor vents when I put my foot down. If it is only temp related, then the most likely culprit is the notorious Emissions control valve. Mounted near the thermostat, is a 3-pronged (temperature-controlled) vacuum-valve. IIRC the originals were a reddy-brown colour. When the car gets up to operating temp, the valve opens and redirects the vacuum. (I think it may go to the EGR valve?) Any way, they are notorious for getting brittle and snapping, opening up the vacuum to the atmosphere. If that control-valve is intact and working, it could be the EGR valve itself that's stuffed and leaking. |
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Cortina TF Ghia 1981
Hybrid Mode