1992 Pontiac Grand Prix MAP Sensor problem????

1992 PONTIAC GRAND PRIX
120,000 MILES • 6 CYL • FWD • AUTOMATIC
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COLIN-IRL
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Hi Guys, my 92 pontiac grand prix 3.1 V6 is running very rough at idle, tries to stall , and won't rev past 4000RPM.. I think the problem is the MAP sensor, can you tell me where this is located on my engine? I know its on the intake manifold, but not sure which one it is. Thanks in advance.

Colin.
Oct 25, 2008 at 8:16 AM
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MMPRINCE4000
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Should be on rear or side of intake. The connector is usually green three prong and the MAP is connected to manifold vacuum.
Check the vacuum line first for tears/cuts and make sure the connector is not broken.

The MAP will set an error code, so jumping terminals A and B of the ALDL will flash the MAP error code.

The ECM will set a default value to the MAP if it fails, this is always a rich (WOT) setting to prevent a lean engine.
Oct 26, 2008 at 8:28 AM