Possible vacuum leak
Thread Starter
|
Mountain Pass
Joined: Feb 2017
Posts: 125
Likes: 10
From: Chicago
Possible vacuum leak
I have been having some issues I think are vacuum related but I'm not sure how to correctly diagnose or pinpoint exactly where the problem is.
2 issues that seem vacuum related:
The first is a sound and vibration I get while driving forward. While the wheels are moving, it sounds just like a baseball card in bike spokes, it usually happens after I backed out of a parking spot and put it back into drive. I will get that sound and vibration until I slow down, and just as I begin to stop, I feel and hear a big bump and the sound goes away.
The second is the old school **** climate control settings. The settings switch without moving the *****. Sometimes while I have the AC running through the dash vents it will switch to the defrost setting and then back to AC after a couple minutes. Sometimes it won't stay in the defrost setting and switches to the vents.
Any ideas on how to diagnose?
2 issues that seem vacuum related:
The first is a sound and vibration I get while driving forward. While the wheels are moving, it sounds just like a baseball card in bike spokes, it usually happens after I backed out of a parking spot and put it back into drive. I will get that sound and vibration until I slow down, and just as I begin to stop, I feel and hear a big bump and the sound goes away.
The second is the old school **** climate control settings. The settings switch without moving the *****. Sometimes while I have the AC running through the dash vents it will switch to the defrost setting and then back to AC after a couple minutes. Sometimes it won't stay in the defrost setting and switches to the vents.
Any ideas on how to diagnose?
Last edited by Twonky; Apr 28, 2017 at 12:05 PM. Reason: make it clearer to understand
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
The second is probably a vacuum issue although that last comment doesn't make sense, the first isuue might be (or not).
Use a Might Vac pump to diagnose.
Or, just cap off the vacuum line that goes to the PVH solenoid (they tend to leak when the housing cracks) to isolate it from the vacuum distribution system and see if the HVAC controls behave themselves. Also check the vacuum line that runs near the battery and through the firewall. They tend to get brittle and crack particularly in that location.
Use a Might Vac pump to diagnose.
Or, just cap off the vacuum line that goes to the PVH solenoid (they tend to leak when the housing cracks) to isolate it from the vacuum distribution system and see if the HVAC controls behave themselves. Also check the vacuum line that runs near the battery and through the firewall. They tend to get brittle and crack particularly in that location.
Thread
Thread Starter
Forum
Replies
Last Post
Todd Fuller
1997 - 2006 Expedition & Navigator
12
Apr 30, 2014 10:31 PM
