What is this?
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New User
Joined: Oct 2007
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What is this?
Went to go replace the valve cover gasket today and found a plug that wasn't connected to anything nor can I find where it "might" go.
Here is a pic of said plug.
Its the black one to the left of the red wire on the second pic. It runs the pass side above the fuel rail and intake w/ 2 other single wire connectors.
Here is a pic of said plug.
Its the black one to the left of the red wire on the second pic. It runs the pass side above the fuel rail and intake w/ 2 other single wire connectors.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
It looks kinda like a EGR control valve connector but it maybe unused and have no place to connect to.
The "red wire" is a vacuum line and needs to be connected to its port. Did you unplug it while working or did you find it just laying there?
If you can't find anyplace to connect the vacuum line just plug it with a small bolt for now.
The "red wire" is a vacuum line and needs to be connected to its port. Did you unplug it while working or did you find it just laying there?
If you can't find anyplace to connect the vacuum line just plug it with a small bolt for now.
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Originally Posted by subford
What are the wire colors?
What are we working on? (year, engine size)
What are we working on? (year, engine size)
Yeah I'm bad about info, 90 F150 4.9l
I didn't unplug it so no clue where it leads. Everything else is acounted for that has been disconnected.
Tuned
Joined: May 2007
Posts: 446
Likes: 7
I just changed the passenger side valve cover gasket today. What a pain. It was tough keeping all those plugs and cords and crap out of the way. That looks like the same plug that was in the same assembly as the coil and some other plugs i have no idea what for. The one i had like that plugged into a port right next to a gray one. Thats all i remember.
Probably not much help, but i wanted to share.
Probably not much help, but i wanted to share.
Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
just an extra plug, mine is like that as well. me thinks it may be for the injector cooling fan installed on some early efi 300s.
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Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Originally Posted by Rabbit16v
Wire has tape and a loom but I think I see grey and brown (maybe?)
Yeah I'm bad about info, 90 F150 4.9l
I didn't unplug it so no clue where it leads. Everything else is acounted for that has been disconnected.
Yeah I'm bad about info, 90 F150 4.9l
I didn't unplug it so no clue where it leads. Everything else is acounted for that has been disconnected.
It does not sound like you have this accessory.
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I also have a 1990 4.9. Got bundled up and went out to have a look. It is still 28 deg here so I didn't spend a long time looking.
Since it looks like you have the upper plenum off and the connector is on the passenger side close to the injectors, I looked there only.
The red "wire" is a vacuum line. One end connects to the vacuum tree coming off the upper plenum, and the other end connects to the fuel pressure valve located on the fuel rail.
The connector goes one of two places. There are no extras visible on my truck. The first spot is the air temp sensor located just behind the alternator on the lower plenum.
The second possibility is the water temp sensor used by the computer. It is located between the alternator and the upper radiator hose. The wire colors for the water temp sensor are green/red stripe I think.
Can't tell what color the wires are on the air charge temp sensor. Not much wire showing, and it is dirty and not easily reached to clean.
If the wires on your connection are pretty long, they may reach somewhere else that I didn't look. Be glad to look some more if this doesn't get r done.
If you need pics holler.
Good luck Frank
Since it looks like you have the upper plenum off and the connector is on the passenger side close to the injectors, I looked there only.
The red "wire" is a vacuum line. One end connects to the vacuum tree coming off the upper plenum, and the other end connects to the fuel pressure valve located on the fuel rail.
The connector goes one of two places. There are no extras visible on my truck. The first spot is the air temp sensor located just behind the alternator on the lower plenum.
The second possibility is the water temp sensor used by the computer. It is located between the alternator and the upper radiator hose. The wire colors for the water temp sensor are green/red stripe I think.
Can't tell what color the wires are on the air charge temp sensor. Not much wire showing, and it is dirty and not easily reached to clean.
If the wires on your connection are pretty long, they may reach somewhere else that I didn't look. Be glad to look some more if this doesn't get r done.
If you need pics holler.
Good luck Frank