vacuum lines
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Elder User
Joined: Mar 2002
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From: Conroe, TX
vacuum lines
On the A/C control side of the vacuum lines should there be a check valve some where in the lines?
Also how do you test to see if the fuel vapor management valve has gone bad?
Chris
Also how do you test to see if the fuel vapor management valve has gone bad?
Chris
Thread Starter
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Elder User
Joined: Mar 2002
Posts: 950
Likes: 0
From: Conroe, TX
I have two vacuum problems that i am trying to fix. One is the HVAC vents moving to defrost when i accelerate. The other is a check engine light caused by egr low flow. I have pulled a vacuum on all the lines. All will hold a vacuum except for the white line leading to the fuel vapor managment valve. I cant even pull 1" of Hg on that line.
I was able to find a diagram showing a check valve on the HVAC vacuum side. Where is the check valve located? This should fix my vent moving problem.
On the EGR code, i know it is being caused by a lack of vacuum. The only line that i can't pull a vacumm on is the line leading to the fuel vapor managment valve, located below the battery. How can i test this valve to see if it is working correctly?
Chris
I was able to find a diagram showing a check valve on the HVAC vacuum side. Where is the check valve located? This should fix my vent moving problem.
On the EGR code, i know it is being caused by a lack of vacuum. The only line that i can't pull a vacumm on is the line leading to the fuel vapor managment valve, located below the battery. How can i test this valve to see if it is working correctly?
Chris
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