# Vac problems

**URL:** <https://community.cartalk.com/t/vac-problems/44745>\
**Category:** Maintenance/Repairs\
**Tags:** ram, dodge, wheels, 1500\
**Created:** [February 19, 2010, 1:13pm UTC](https://community.cartalk.com/t/vac-problems/44745 "2010-02-19T13:13:05Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![johnny132](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@johnny132](https://community.cartalk.com/u/johnny132)\
**Post date:** [February 19, 2010, 1:13pm UTC](https://community.cartalk.com/t/vac-problems/44745/1 "2010-02-19T13:13:05Z")

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cruising down the road i lose vacuum and heater blows in dash not defrost i let off of gas and heat comes out then 4 sec. it goes back to dash ? any ideals

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [February 19, 2010, 2:14pm UTC](https://community.cartalk.com/t/vac-problems/44745/2 "2010-02-19T14:14:10Z")

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Find the vacuum leak and repair it.

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**Author:** ![johnny132](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@johnny132](https://community.cartalk.com/u/johnny132)\
**Post date:** [February 20, 2010, 12:12am UTC](https://community.cartalk.com/t/vac-problems/44745/3 "2010-02-20T00:12:07Z")

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where to look

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**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\
**Post date:** [February 20, 2010, 12:28am UTC](https://community.cartalk.com/t/vac-problems/44745/4 "2010-02-20T00:28:24Z")

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First, look to the vacuum line that runs from the engine to the firewall. There should be a check valve to prevent loss of vacuum to the dash controls when the engine vacuum drops. I’ll be the vacuum lines are cracked or degraded. With a 13 year old van, bad vacuum lines are very common.

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**Author:** ![johnny132](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@johnny132](https://community.cartalk.com/u/johnny132)\
**Post date:** [February 20, 2010, 12:38am UTC](https://community.cartalk.com/t/vac-problems/44745/5 "2010-02-20T00:38:28Z")

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the vacuum lines look good i am tiring to find a check valve my local dealer had no ideal what i was talking about i have another guy looking for one

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**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\
**Post date:** [February 20, 2010, 12:49am UTC](https://community.cartalk.com/t/vac-problems/44745/6 "2010-02-20T00:49:25Z")

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Try the ‘HELP’ section at the local auto parts store. It has a bunch of small stuff like this. These parts are made by Dorman. Here is a page at [RockAuto.com](http://RockAuto.com). The first valve is what youor looking for. [http://www.rockauto.com/catalog/x,extras,1,subgroup,Valve,parttype,318](http://www.rockauto.com/catalog/x,extras,1,subgroup,Valve,parttype,318)  
[http://info.rockauto.com/RB/47149.jpg](http://info.rockauto.com/RB/47149.jpg)