First Post Already Asking For Help
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New User
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First Post Already Asking For Help
First off a little introduction my name is Zach and I not so recently bought a 94 F250 with the 5.8l EFI engine. It was pretty rusty and I am currently putting on a new box and the truck has sat for awhile so I figured I would start her up and let her run after I got it started I noticed that there was air coming from two holes on the backside (towards the engine) of this thing and when I checked on another 5.8l truck we have and air wasn't coming out of them on this. Anyways this is the part its on the driver side of the engine I was just wanting to know what it is and if this is an issue. Also on the other truck there wasn't any extra hose coming out of the end of the piece as on the far left of the picture.
Thanks for the help.
Thanks for the help.
Senior User
Joined: Jul 2013
Posts: 120
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Hi Zach,
That's the air diverter valve for the smog pump/air pump. It's probably just in bypass mode, when the engine warms up it pumps fresh air into the exhaust via the back of the heads or the catalytic converter.
Bob
That's the air diverter valve for the smog pump/air pump. It's probably just in bypass mode, when the engine warms up it pumps fresh air into the exhaust via the back of the heads or the catalytic converter.
Bob
Mountain Pass
Joined: Nov 2013
Posts: 197
Likes: 32
From: Atlanta
Another Zack with a '94 F250? Small world...
If the cat has been removed what happened to the air tube that went to the cat? Has it been plugged? Or is it just disconnected? Either way without a cat the AIR system isn't really doing anything.
If the cat has been removed what happened to the air tube that went to the cat? Has it been plugged? Or is it just disconnected? Either way without a cat the AIR system isn't really doing anything.
Elder User
Joined: Jun 2013
Posts: 712
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From: Booneville, Missouri
Welcome Aboard!
Hello and good afternoon.
Just wanted to welcome you to FTE.
There are a lot of members who are very good regarding solutions to your problem and there expertise is evident.
You came to the right place.
Take care and Godspeed
Boon
Just wanted to welcome you to FTE.
There are a lot of members who are very good regarding solutions to your problem and there expertise is evident.
You came to the right place.
Take care and Godspeed
Boon
Senior User
Joined: Jul 2013
Posts: 120
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I guess at that point all the air tubes become bypass tubes haha. My 93 yard truck is the same way, no cats and I plugged the holes on the head...but I left the pump there, so it's pumping air nowhere for no reason whatsoever.
Elder User
Joined: Jun 2013
Posts: 712
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From: Booneville, Missouri
How do you do it?
First off a little introduction my name is Zach and I not so recently bought a 94 F250 with the 5.8l EFI engine. It was pretty rusty and I am currently putting on a new box and the truck has sat for awhile so I figured I would start her up and let her run after I got it started I noticed that there was air coming from two holes on the backside (towards the engine) of this thing and when I checked on another 5.8l truck we have and air wasn't coming out of them on this. Anyways this is the part its on the driver side of the engine I was just wanting to know what it is and if this is an issue. Also on the other truck there wasn't any extra hose coming out of the end of the piece as on the far left of the picture.
Thanks for the help.
Thanks for the help.
Please wait until your problem(s) are fixed before you respond as I am "butting in.
Thank you!
Boon
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Also thank for the welcomes and the help just wanted to make sure nothing was wrong because I think the truck still runs a little rich I need to pull the plugs and look an not be lazy. Anyways thanks again and I appreciate the welcomes.
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Elder User
Joined: Jun 2013
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From: Booneville, Missouri
Thanks for the tip.
On photobucket there is a option to edit and you can do all sorts of neat stuff on it like what I did then you just link the image and all is good.
Also thank for the welcomes and the help just wanted to make sure nothing was wrong because I think the truck still runs a little rich I need to pull the plugs and look an not be lazy. Anyways thanks again and I appreciate the welcomes.
Also thank for the welcomes and the help just wanted to make sure nothing was wrong because I think the truck still runs a little rich I need to pull the plugs and look an not be lazy. Anyways thanks again and I appreciate the welcomes.
This is a great forum and you will receive an abundance of help so thread/post away!
Take care and Godspeed!
Boon
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