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What's this black box?

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Old 05-29-2015, 12:27 AM
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
What's this black box?

I don't have this on my earlier TPIs. What's that black box behind the runners on my '92?
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Last edited by chazman; 05-29-2015 at 12:32 AM.
Old 05-29-2015, 02:29 AM
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Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: What's this black box?

MAP sensor. Measures intake vacuum on engines that do not have a MAF sensor.
Old 05-29-2015, 08:46 AM
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Join Date: Dec 2001
Location: Chicagoland
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: What's this black box?

Originally Posted by eseibel67
MAP sensor. Measures intake vacuum on engines that do not have a MAF sensor.

Thanks!
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