Mystery tubes
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Mystery tubes
I am getting my plow truck (1997 F250) ready for the winter season and noticed something hanging below. Checking it out I discovered 2 tubes, one blue and one pink. I know a little about vehicle repair but not enough to figure out where these two guys are supposed to be connected. 
I traced the two back to the top of the engine compartment next to the firewall behind the battery. I've included a few pictures. Any help including pictures of where they should be connected would be of great help.
I traced the two back to the top of the engine compartment next to the firewall behind the battery. I've included a few pictures. Any help including pictures of where they should be connected would be of great help.
Fleet Mechanic
Joined: Jul 2006
Posts: 1,346
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From: Rapid City, SoDak
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Vacuum control doodads? Remember I am not an expert mechanic. I know a little about vehicle repair. I just changed a starter on my future son-in-laws car tonight and that is about the best you get from me. A doodads definition would be great. 
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Fleet Mechanic
Joined: Jul 2006
Posts: 1,346
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From: Rapid City, SoDak
Well i'm not sure what all on these trucks is vacuum controlled. Does your cruise control work? Do all the heating/cooling controls including the flap that changes from cool to heat work?
You might stick your finger over the end of the tubes with the truck running and see if they're sucking air, if they are then they're vacuum tubes, if they aren't they might still be vacuum tubes and that's not the end they suck from. But if they were sucking at least you'd know.
Has your idle speed increased at all?
You might stick your finger over the end of the tubes with the truck running and see if they're sucking air, if they are then they're vacuum tubes, if they aren't they might still be vacuum tubes and that's not the end they suck from. But if they were sucking at least you'd know.
Has your idle speed increased at all?
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