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Anybody know what this and what it does

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Old Aug 5, 2016 | 11:08 AM
  #1  
trafficlightguy's Avatar
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From: Holly Springs NC
Car: 1988 iroc
Engine: 350 30 over
Transmission: T5
Axle/Gears: Series 2 373
Anybody know what this and what it does



The rectangle mounted to the top of firewall
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Old Aug 5, 2016 | 12:11 PM
  #2  
gearhead141's Avatar
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From: Escondido, Ca
Car: 1985 Trans Am
Engine: LG4
Transmission: 700R4
Axle/Gears: 3.08
Re: Anybody know what this and what it does

Is this a Camaro or a Firebird? And can you tell us what year this is? It may not make any difference, but is the car an automatic or manual trans? The more information you give, the better it is for us to narrow it down.
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Old Aug 5, 2016 | 12:28 PM
  #3  
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From: Holly Springs NC
Car: 1988 iroc
Engine: 350 30 over
Transmission: T5
Axle/Gears: Series 2 373
Re: Anybody know what this and what it does

Originally Posted by trafficlightguy


The rectangle mounted to the top of firewall
It's a 1988 camaro with a 355 carb ,iam re-installing the a.c. system and I am trying to figure out the wiring harness, and there a plug that goes to this and I don't know what it is or doe
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Old Aug 5, 2016 | 01:36 PM
  #4  
8t2 z-chev's Avatar
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: Anybody know what this and what it does

that is the MAP sensor-tells the ECM how much vacume the engine is pulling.MAP sensor location varies with different years and engines,'84 up carbed v8s have a same appearance BARO sensor in that location.
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Old Aug 5, 2016 | 02:04 PM
  #5  
gearhead141's Avatar
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From: Escondido, Ca
Car: 1985 Trans Am
Engine: LG4
Transmission: 700R4
Axle/Gears: 3.08
Re: Anybody know what this and what it does

I had a hunch that might be what it was. It is not in that location on my Firebird, which is why I was asking what model Thirdgen this was.
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Old Aug 8, 2016 | 02:11 AM
  #6  
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From: Howard Lake, MN
Car: 86 Camaro
Engine: 355- hopefully a 5.3 this summer
Transmission: 700r4
Axle/Gears: 3.42
Re: Anybody know what this and what it does

just a standard GM MAP sensor...
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Old Aug 12, 2016 | 07:24 PM
  #7  
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From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: Anybody know what this and what it does

Originally Posted by novaderrik
just a standard GM MAP sensor...
On yet another one of GM's stamped steel brackets fastened with a regular sheet metal screw. In some ways GM made these engines bays look so cheap and thrown together.
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Old Aug 12, 2016 | 10:29 PM
  #8  
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From: CT
Car: 1984 Chevrolet Camaro Z28
Engine: 5.0 Liter 4-BBL V8 High Output
Transmission: 5-Speed Manual
Axle/Gears: 3.73
Re: Anybody know what this and what it does

Shouldn't That Be Mounted Underneath The Cowl.


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Old Aug 13, 2016 | 12:12 AM
  #9  
mynameisfrank89's Avatar
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From: michigan
Car: 1987 camaro irocZ
Engine: 350 tpi
Transmission: t5
Axle/Gears: 3.42
Re: Anybody know what this and what it does

i believe it should be under the cowl
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Old Aug 13, 2016 | 03:57 AM
  #10  
novaderrik's Avatar
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From: Howard Lake, MN
Car: 86 Camaro
Engine: 355- hopefully a 5.3 this summer
Transmission: 700r4
Axle/Gears: 3.42
Re: Anybody know what this and what it does

Originally Posted by Tibo
On yet another one of GM's stamped steel brackets fastened with a regular sheet metal screw. In some ways GM made these engines bays look so cheap and thrown together.
these cars were cheaply built and thrown together..
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Old Aug 13, 2016 | 04:54 AM
  #11  
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From: MA
Car: 1989 IrocZ
Engine: 421 Dart Stroker
Transmission: 4L60E Cahall Performance Built
Axle/Gears: Midwest Chassis Fab 9/ 3.55 gears
Re: Anybody know what this and what it does

88 was mass air.
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Old Aug 13, 2016 | 09:28 AM
  #12  
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From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
Re: Anybody know what this and what it does

88 was mass air.
100% agree, but that is definitely a MAP sensor.
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Old Aug 13, 2016 | 10:18 AM
  #13  
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From: MA
Car: 1989 IrocZ
Engine: 421 Dart Stroker
Transmission: 4L60E Cahall Performance Built
Axle/Gears: Midwest Chassis Fab 9/ 3.55 gears
Re: Anybody know what this and what it does

Something doesnt match.
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