Hi again, guys,

Not only do I not know what this connector is called or a part# for it, but I think the vac lines are connected to it incorrectly. There is one spot where there is no line, and I have capped it with a screw to stop the leak.

This is an 89 F250 4X4 351 (5.8) Vin H, Auto trans.

I've tried desperately to find a diagram of where the vac lines go, but to no avail. I bought Ford's Electrical and Vacuum Diagnostics book but it is also useless. The 89 F250 isn't diagrammed in the book, it's the only one missing.

The sticker under the hood is there, but it's made more for describing what runs what, not where to route the lines, what's in the system, or what things are called.

Any help here would be appreciated.

The reason I got looking at the lines, is because when I accelerate the heater switches from whatever I have it on to defrost, and back after the engine is once again under minimal load. Anyone else ever see this in their truck?

 

I believe your talking about the vac actuator that goes over by where the heater hoses run in on the firewall. There is a clip that holds that vac motor to the blend valve. If it comes off it does what you describe. If you open your hood and go back on the pass side,by the hood hinge you will see it.

 

You think there might be a leak in the line that runs to the vac motor then? I'll look tomorrow when the sun is back up

Any idea what the connector is that I linked a picture to? I really need to know what the right lines are that go into that, and the colors, etc.

Thanks Deez

 

I checked that clip, everything is solid and can't move around. I also checked all the vac lines routed to the heater controls, and all seem to be solid and hooked up.

Unless the lines going into that connector I can't name are out of order, I can't find anything that might cause the blend door to re-position under acceleration.

I'm stumped.

The good news is Beast is all back together. Runs entirely different without that cracked manifold on there

 

https://www.ford-trucks.com/forums/9...m-diagram.html Read the post by rla in this link. Follow his instructions and it may get you a vacuum diagram.

 

Lazy K, I linked an image in my first post, and all I need is to know what that part is called. If I can learn that then I can probably find the proper vac line configuration for what goes in/out of it. It's not on the vacuum label

 

Im sure that you could just sub that connector with a few pieces of rubber line that fits it well.

 

The reason I am trying to find out what it is, is so I can find out what the proper lines that plug into it and in what part of each of the 5 possible connections they should be in. I think they are not plugged in correctly.

 

The part in that photo is the connection point between the chassis and the engine. You will find no reference to it in any vacuum diagram. Think of it as a quick connect when the vehicle is rolling down the assembly line.

You need to trace both ends of the vacuum lines on either side to see where each end terminates. It is common to eliminates that piece when running new vacuum lines.

 

Hi.

I have that same connector on my truck. There are two lines going through it, but they are on the same side of the connector IIRC. Looks like yours got rotated or something. Try plugging the open space on the connector to prevent a vacuum leak until you can fix it. I will try to get a pic later.

 

Thanks for the info, I'll look at it on the other end and try to trace them

 

I did plug the open end with a small screw, so no leaks for now. A photo of yours would be great! It is the connector nearest the vac reservoir.

 

The connector:



The red line seems to run to whatever this is on the passenger side wheel well: