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09-24-2021, 08:39 PM
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#1
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Junior Member
Join Date: Aug 2021
Posts: 8
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2000 F53 V10 A/C Vents
Under a heavy load such as pulling a long hill, my dash A/C vents drop out which indicate a lack of vacuum to that circuit. I have looked for a vacuum reservoir or a auxiliary vacuum pump to no avail. After inspecting what vacuum lines I can see nothing looks amiss. Any Ideas?
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09-24-2021, 08:49 PM
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#2
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Senior Member
Join Date: Jun 2019
Posts: 236
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Same thing on my 2001 F53 there is a vacuum box located passenger side above the axle the check valve in it was bad ford makes a kit to replace the box and valve.
__________________
2001 XL3550 BSL (Blue Ox)
2011 JK Wrangler
Co-pilot Sandi Visalia Ca
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09-24-2021, 08:56 PM
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#3
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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A vacuum reservoir SHOULD have been standard in your application , there are check valves between the engine manifold and the dash system to maintain HVAC controls during long climbs and some members have needed to add a second reservoir to maintain dash system operation.
Reservoir is softball size/shape , black plastic , replacements/additional units are about $14 on Amazon or E bay.
I had to add one on my Dodge Dakota pickup to deal with the loss of control.
EDIT: I see 01blueox posted better info while I was typing , sorry for the duplication .
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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09-24-2021, 11:41 PM
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#4
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Senior Member
National RV Owners Club Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 3,784
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Vacuum reservoir should be in the passenger side wheel in front of tire. Look in wheel well towards the front should see the oblong reservoir with a couple of tubes connected to it.
__________________
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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09-25-2021, 06:33 PM
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#5
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Junior Member
Join Date: Aug 2021
Posts: 8
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Good thing I asked I would have never seen where the vacuum box was located. When I return home from our trip I’ll check with my local Ford dealer for a replacement box.
Thanks again for the help!
Spruce Goose
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09-25-2021, 07:18 PM
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#6
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Senior Member
National RV Owners Club Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 3,784
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Is there something wrong with yours?
__________________
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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09-26-2021, 07:25 AM
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#7
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Senior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Nov 2010
Location: Texas
Posts: 4,283
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On a long hard pull, shutting off the A/C helps the engine. Leave it alone. Reduce throttle.
__________________
Full Timers.
2015 Fleetwood Discovery 40E on a Freightliner XCS chassis with a Cummins ISL9 pulling 1 and/or 2 motorcycles, '07 Honda Accord OR a 17' Runabout Boat.
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09-26-2021, 10:38 AM
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#8
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Junior Member
Join Date: Aug 2021
Posts: 8
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The vacuum tank from what I have read has a one-way check valve in it. If that is true then that would explain why my AC vents drop out under a load.
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09-26-2021, 10:42 AM
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#9
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Junior Member
Join Date: Aug 2021
Posts: 8
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Good advice and very true. Driving a 33 ft RV with a 2,000 lb. car in a trailer up Monarch Pass in Colorado, the engine needs all the help it can get!
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09-27-2021, 08:51 AM
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#10
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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IMHO Engine should still have enough vacuum to operate the AC door under heavy load. I remember small inline check valves used in autos as well. Not uncommon for light vacuum hoses to crack near source near intake where it's much hotter. We use to use carb cleaner sprayed in vacuum port to wash out carbon deposits as well to find vacuum leaks as engine would stumble if sprayed on leak.
Quote:
Originally Posted by Spruce Goose
The vacuum tank from what I have read has a one-way check valve in it. If that is true then that would explain why my AC vents drop out under a load.
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__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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09-28-2021, 12:09 PM
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#11
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Senior Member
Join Date: Jun 2019
Posts: 236
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The V10 is an rpm engine make hp at 4,000 rpm keep the r's up in the moutains
__________________
2001 XL3550 BSL (Blue Ox)
2011 JK Wrangler
Co-pilot Sandi Visalia Ca
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