I've been chasing the hard shift on my SDL, and after reading articles, I think I have found the issue here. I replaced the rubber fittings to the trans vac modulator, and in the process, found this one vac line thats totally disconnected. See pic below.

Does anyone know where this goes?

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

I can probably tell you where it goes if you follow it back to the other end and tell me where it ends up.

The photo is not clear enough..........

Sorry about the cruddy pics. I used my sidekick 3 to take em.

The hose, It goes into the firewalll....

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

If everything is working, that's probably the vent hose for the VCV.

Look on the side of the VCV and see if the vent hose is attached.

Thanks Brian, VCV= Vacuum Control Valve? Where is that located?

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

It's right on the top of the injection pump near the back of the pump. It's got two vacuum lines that come right out the top. One of them goes into the same bundle as the loose one. It terminates at the amplifier (blue flying saucer).

But the line that doesnt go anywhere looks like it goes inside the car.....

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

I understand that it goes into the cabin.

Doesn't the open line go into the bundle and head into the cabin over by the fuse box? This is the normal setup.

Can ya wait until Sat/Sun? I could bring my SDL by so you can compare...

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
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