MAP Sensor? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-15-2004, 02:51 PM   #1
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Default MAP Sensor?

What is it and what does it do?
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Old 09-15-2004, 03:59 PM   #2
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do you mean maf?
the Mas * AirFlow sensor is located on the intake, and it tells the car how much air is passing through the intake.
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Old 09-15-2004, 04:06 PM   #3
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Old 09-15-2004, 04:08 PM   #4
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couldn't have said it much better myself

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MAP Sensor (Manifold Absolute Pressure) Measures the air pressure in the intake manifold. Changes in engine operation and speed will affect the MAP sensor reading, which the computer uses in fuel and timing calculations. Often it will have a single vacuum line connection plus an electrical connection. Some turbo charged cars also use the MAP sensor to measure barometric pressure.
it'* no fun when they die. your car can't decide what it should be doing as far as fuel, so it'll cut it out, sometimes it'll dump it all in...

it'* a headache if it goes bad. luckily, it'* usually quite simple to replace on a car.
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Old 09-15-2004, 04:44 PM   #5
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Thanks Haro you rock! Awesome link.
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