What's this do? Broken Vacuum Line - Ford Powerstroke Diesel Forum

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post #1 of 13 Old 03-30-2012, 06:09 PM Thread Starter
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What's this do? Broken Vacuum Line

Hey guys I was just poking around under my hood today and found this broken vacuum line. It's up near the front passenger side right by the battery and radiator. Anybody knows what this line is for?

Thanks,
Nate
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post #2 of 13 Old 03-30-2012, 06:40 PM
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You must hear your pump running constantly?

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
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post #3 of 13 Old 03-30-2012, 06:53 PM Thread Starter
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Not really sure? I guess I will have to listen more closely for it. I've only had the truck for about two months now and only have about 300 miles on it. I haven't noticed anything weird. Where is the vacuum pump located?

Edit: I have noticed that my 4x4 hasn't been engaging but the heater controls work.

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post #4 of 13 Old 03-30-2012, 06:59 PM
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The line must go to your 4wd then.
Can you switch between vent, floor, and defr?



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post #5 of 13 Old 03-30-2012, 07:02 PM Thread Starter
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Yes I can change the different blower outputs for the ac/heat.

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post #6 of 13 Old 03-30-2012, 07:08 PM
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Yeah it's for 4x4 (auto)
I've got my pump disconnected, my heater controls work fine.

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
6.4 Rebuild May/2015, BD manifolds+Uppipes, chromoly rods, rockers,lifters, hd springs
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post #7 of 13 Old 03-30-2012, 07:13 PM Thread Starter
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Cool. I will look into it some more tomorrow and trace the lines and see where they go. Didn't really have time to investigate today, figured somebody on here would probably know.

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post #8 of 13 Old 03-30-2012, 08:23 PM
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I broke a line that goes underneath batter/degas bottle tray when I did egr delete, too cold/lazy to fix it so I just unplugged the vacuum pump, and locked hubs in. Need them locked all winter here anyways so no big deal.

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
6.4 Rebuild May/2015, BD manifolds+Uppipes, chromoly rods, rockers,lifters, hd springs
Monstir 20", 37x12.50 ATZ P3
1999 Corvette Cpe
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post #9 of 13 Old 03-31-2012, 05:14 AM
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At least you probably use defrost all the time too.



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post #10 of 13 Old 03-31-2012, 08:53 AM
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95% of the time its on the floor/defrost setting, when its really cold I sometimes put it on dash vents and pointed at steering wheel lol.
I thought at first no vacuum would make hvac go to default setting (defrost) like the 6.0 but it doesnt.

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
6.4 Rebuild May/2015, BD manifolds+Uppipes, chromoly rods, rockers,lifters, hd springs
Monstir 20", 37x12.50 ATZ P3
1999 Corvette Cpe
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