throttle air bypass valve?
 

I can unhook this @#$% thing without any noticeable change but the car runs fine. What does this mean?

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1987 black with t-tops. Cobra intake, 1.7 cobra crane rollers, gt40p's, bbk shorties, off road h-pipe, adj. FPR, rebuilt aod w/shift kit, 65mm TB, 4.10's 12.90's at best probably less, oops I mean worse.
*** AOD's. IT'S MANUAL! Now for the T-5z!
Semper Fi

The rpm's in my car would jump higher in between shifts & when I put it in neutral on my way to a stop, untill I stopped. It was driving me crazy, so I toke it off & made a plate to cover the holes. That seemed to solve that problem, but created a new one, the car acts like it has no choke, having to give it gas for a couple of minutes before it would stay running. I'm might try that plate to go in between it & t.b. with two adj. screws, I heard that might work (no idle problems & good choke).

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90LX,Vortech-V2SQ