Question about 1996 Pontiac Grand Am
TRUE... you do NOT have a MAF (mass Air Flow) sensor
instead you vehicle uses a MAP (manifold absolute pressure) sensor
the difference is the MAF is around $300 and the MAP is $50
the MAF actual measures the amount of air entering the engine and the MAP "assumes" the air intake based on engine vacuum or the absence there of
to test the MAP, which will give you the concern you have...
you will need a DVOM (digital volt ohm meter) and a vacuum gauge
at sea level, no vacuum, record voltage at the MAP
then apply about 18" vacuum and measure voltage again
I cannot recall the specs but you should see something like 5volts with no vacuum and 2volts with 18" vacuum
(or visa versa)
in addition to your MAP, you could also have problems with your TP 9throttle position) sensor which you did not mention if you replaced
keep me posted!
Posted on May 27, 2010
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Posted on Jan 02, 2017
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