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Anybody know what this and what it does

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Old 08-05-2016, 11:08 AM
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Anybody know what this and what it does



The rectangle mounted to the top of firewall
Old 08-05-2016, 12:11 PM
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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.
Old 08-05-2016, 12:28 PM
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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
Old 08-05-2016, 01:36 PM
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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.
Old 08-05-2016, 02:04 PM
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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.
Old 08-08-2016, 02:11 AM
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Re: Anybody know what this and what it does

just a standard GM MAP sensor...
Old 08-12-2016, 07:24 PM
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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.
Old 08-12-2016, 10:29 PM
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Re: Anybody know what this and what it does

Shouldn't That Be Mounted Underneath The Cowl.


Old 08-13-2016, 12:12 AM
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Re: Anybody know what this and what it does

i believe it should be under the cowl
Old 08-13-2016, 03:57 AM
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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..
Old 08-13-2016, 04:54 AM
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Re: Anybody know what this and what it does

88 was mass air.
Old 08-13-2016, 09:28 AM
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Re: Anybody know what this and what it does

88 was mass air.
100% agree, but that is definitely a MAP sensor.
Old 08-13-2016, 10:18 AM
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Re: Anybody know what this and what it does

Something doesnt match.
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