what is that black box for
Junior Member
Joined: Aug 2001
Posts: 6
Likes: 0
From: MIAMI FL.
The black box in your picture is a diverter valve for the air pump. the valve is activated by the computer. the valve diverts air to the exhaust manifolds or the cat depending on weather the engine is cold or hot hope this helps
Supreme Member
Joined: Jul 2000
Posts: 1,787
Likes: 20
From: Tomball, TX
Car: 89 TTA
Engine: Turbo 3.8
Transmission: 200R4
Yea, that's the air diverter valve. If you aren't running smog stuff you probably won't need it. But Michigan is a nice state, run your emissions equipment. 
Senior Member
Joined: Mar 2001
Posts: 629
Likes: 10
From: New Yuck
Car: Non F-body :(
Engine: Pontiac 301
Transmission: TH350
It's called the AIR diverter valve or PEDES valve.
If you keep your AIR pump and AIR headers/manifolds and cat you'll need it. If you're not going computer-controlled, then you don't need it.
If you keep your AIR pump and AIR headers/manifolds and cat you'll need it. If you're not going computer-controlled, then you don't need it.
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