What is this? (pic)
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New User
Joined: Oct 2007
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What is this? (pic)
Hi guys, I was poking under the hood of my truck today and noticed this. i was wondering what this thing is? is there supposed to be a hose connected at the end? it is a 1995 f250 with the 5.8l. sorry for some basic questions but i am trying to learn, and getting a lot worse gas mileage recently and so any help would be appreciated.
Senior User
Joined: Mar 2009
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From: metro detroit area...
it sure could, but you would probably notice the engine running poorly as well. Not sure if that is something that could be a gradual problem but i've always heard about them going all at once
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it is weird, like my gas mileage suddenly changed to 8.5 mpg no matter how i drive it. i just put a new o2 sensor in and there are not any vac lines loose. i am getting kind of frustrated because i would like to get to the bottom of the problem.
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
The thing in the picture is the air bypass outlet, not the inlet, but either way, there is nothing that is supposed to attach to that open end.
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Hotshot
Joined: Sep 2001
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If the mpg is really that bad, I would do a tune up on it air filter, fuel filter, plugs, wires, cap, rotor, etc.
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the truck got a whole tune up about 20k ago. When i pulled codes today i got code 172. could that code be caused by a leaking exhaust manifold? my passenger side exhaust manifold just started leaking. i was getting the real bad 8.5mpg even before it started leaking though. any help is appreciated.
Fleet Owner
Joined: Jan 2008
Posts: 26,898
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From: southern md
yeah the newer trucks-well 93 or so were MAF-not sure when the change over happened-somewhere in that time frame! 1st time I saw it on one freaked out-holy crap what a vacuum leak-well I was wrong as usual 
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Joined: Jun 2007
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From: Sweetwater Texas
Jr, I'm getting the same feelin looking at that pic of a MAF 351W as when the first I opened the hood on a Gen 1 7.3 PSD after working on 7.3 IDI, its like a freaking space ship landed in the hood.