98 Bonnie, diff between MAF and MAP and where are they - 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 03-03-2008, 07:54 PM   #1
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Default 98 Bonnie, diff between MAF and MAP and where are they

My neighbors check engine light was on so I scanned it. It came up Manifold Abosolut Pressure. Is this the same as the MAF and the one that goes before the throttle body with the little wires inside ??
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Old 03-03-2008, 08:04 PM   #2
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your MAP is on the passenger side of the engine, on the side of the UIM, it is used to monitor the difference in pressure between the intake manifold at outside atmosphere. The PCV is housed just below the MAP sensor. The MAF is in the throttle body and measures air flow.

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Old 03-03-2008, 11:26 PM   #3
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is the MAP know as Manifold Absolute Pressure sensor ? If it throws this code can it be cleaned like the MAF sensor or do you just replace it ??
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Old 03-04-2008, 12:41 AM   #4
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You check your electrical (plug) first, and make sure you don't have a broken vacuum line. If all that looks good, then replace it, sure.
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