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Three tubes, two connections. huh?

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Old Dec 8, 2018 | 06:57 PM
  #1  
Brian Ochoa's Avatar
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From: San Jose
Car: 1989 Firebird SSA
Engine: 2.8L V-6
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Three tubes, two connections. huh?

So I'm 99.4% sure I have a vacuum leak and decided to trace out some hoses to see if any of them need replacing. So far pretty much every hose I've found has been pretty rotten but I digress. Traced out one hose that started at a fitting at the back of the intake plenum to something else next to the washer fluid reservoir.

I have no clue what this thing is but here's the real mystery. The hose had a T-junction that went to... nothing. Seriously, it was just lying in the battery tray connected to nothing. Try though I might I could not find an empty fitting within reach of the hose and finally just gave up and routed an extra long hose to the two fittings and parked the car.
Any idea what the above part is? And for that matter what the T-junction was supposed to be connected to?
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Old Dec 8, 2018 | 07:04 PM
  #2  
mwill316's Avatar
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From: Indianapolis, IN
Car: '88 GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27
Re: Three tubes, two connections. huh?


This diagram should help you
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Old Dec 8, 2018 | 11:23 PM
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Re: Three tubes, two connections. huh?

If the diagram is unclear, the Sphere of Destiny is under the car.
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Old Dec 11, 2018 | 04:18 PM
  #4  
Brian Ochoa's Avatar
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From: San Jose
Car: 1989 Firebird SSA
Engine: 2.8L V-6
Transmission: 700R4
Axle/Gears: Stock
Re: Three tubes, two connections. huh?

Originally Posted by Drew
If the diagram is unclear, the Sphere of Destiny is under the car.
Diagram was clear and I just got back to the issue at hand. Fabricated a new hose, connected all three ends and the car is running markedly better. Thanks for the help!
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Old Dec 11, 2018 | 08:08 PM
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Re: Three tubes, two connections. huh?

Originally Posted by Brian Ochoa
Any idea what the above part is? And for that matter what the T-junction was supposed to be connected to?
That is a component of the cruise control as seen in view A on the diagram
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