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What fitting/sensor goes into this hole on plenum?

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Old 08-25-2015, 11:15 PM
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Car: 1991 Z28
Engine: 5.7 TPI L98
Transmission: 700-R4
Axle/Gears: Moser 9" with 4.11
What fitting/sensor goes into this hole on plenum?
Lost my notes and pics from when I took it apart. Thanks!
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Old 08-26-2015, 07:28 AM
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Car: 87 IROC
Engine: L31 350
Transmission: T56
Axle/Gears: 4.10 D44
Re: What fitting/sensor goes into this hole on plenum?
Based on the MAP boss and having THREE holes, that is a MAP/SD plenum. That also matches your profile: 91 was SD.

The three connections go to: AFPR, heater controls, MAP sensor. I am not sure of the factory arrangement, but functionally it doesn't matter which item is plugged into which hole.
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Old 08-26-2015, 12:15 PM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: What fitting/sensor goes into this hole on plenum?
Use the vac fitting that fits the rubber 90* fitting on the map sensor.
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Old 08-26-2015, 04:40 PM
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Car: 1991 Z28
Engine: 5.7 TPI L98
Transmission: 700-R4
Axle/Gears: Moser 9" with 4.11
Re: What fitting/sensor goes into this hole on plenum?
Originally Posted by TTOP350
Use the vac fitting that fits the rubber 90* fitting on the map sensor.
Thanks guys. I got all the parts! I want to do this job and not have parts left over like other jobs I have done. Thanks again!
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