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Vacuum Leak or Something Else???

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Old Feb 21, 2019 | 02:44 PM
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Default Vacuum Leak or Something Else???

Hey All,

I know this questions has probably been asked a million times, but I need some help. My truck is only blowing air out of the defroster. I looked around under the hood and can't identify any vacuum leaks (although I'm not 100% confident in my ability to spot one). A few months ago I did replace my check valves. I believe they are still working fine. Am I missing something?

 
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Old Feb 21, 2019 | 03:27 PM
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Originally Posted by ATLKillian
Hey All,

I know this questions has probably been asked a million times, but I need some help. My truck is only blowing air out of the defroster. I looked around under the hood and can't identify any vacuum leaks (although I'm not 100% confident in my ability to spot one). A few months ago I did replace my check valves. I believe they are still working fine. Am I missing something?
Do they change at all when at an idle sitting still?
 
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Old Feb 21, 2019 | 03:55 PM
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Originally Posted by MoparFanatic21
Do they change at all when at an idle sitting still?
No they are the same at idle.
 
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Old Feb 21, 2019 | 06:55 PM
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You have a vacuum leak somewhere then......
 
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Old Feb 21, 2019 | 07:24 PM
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Originally Posted by ATLKillian
No they are the same at idle.
Yep to have a vacuum leak.
 
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