UPDATE....
Yep STEVE was right. That little hose goest to the FPR.

I was fixing my MAS potentiometer and there was the hose hanging down. It was brittle and broke in 2. It's too short now to reach its destination. I've got to change it. Is this a dealer stocked item only or can I get something at NAPA?

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JR
1986 Gold 300E 4Dr automatic