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Where is the map switch located?and how do you replace it?
1999 Chevrolet Astro

Where is the MAP switch located?And how do you replace it?

(1999 Chevrolet Astro)
OBD code is P0101 The van will not accelerate and shift properly. It's fine in park or neutral when accelerating
1 answer & 2 comments
Popular Answer
of Greg's Orange Auto on January 25, 2012
CK YOUR WIRING TO THE MASS AIR FIRST. IT IS EITHER MOUNT ON A BRACKET WITH 3 WIRES GOING TO IT ALONG WITH 1 VAC HOSE, OR ITS IN THE INTAKE MANIFOLD WITH 3 WIRES AND NO VAC SOURCE TO IT. DEPENDING ON WHAT KIND OF INJECTION SYSTEM YOU MAY HAVE
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on January 25, 2012
I've just tried cleaning the MAF SENSOR, and after re-install,van accelerates better. However still not right.
Tested wiring at the 3 wire plug to the MAF with voltage at the black wire around 9 volts &red at -5
of Greg's Orange Auto on January 25, 2012
well your on the right track. you need a pwr wire a grd wire and a 5v ref signal. if you can't do that try a sensor if cleaning helped a new one may be the answer
General Diagnosis
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of Greg's Orange Auto on January 25, 2012
CK YOUR WIRING TO THE MASS AIR FIRST. IT IS EITHER MOUNT ON A BRACKET WITH 3 WIRES GOING TO IT ALONG WITH 1 VAC HOSE, OR ITS IN THE INTAKE MANIFOLD WITH 3 WIRES AND NO VAC SOURCE TO IT. DEPENDING ON WHAT KIND OF INJECTION SYSTEM YOU MAY HAVE
Sign in to reply
on January 25, 2012
I've just tried cleaning the MAF SENSOR, and after re-install,van accelerates better. However still not right.
Tested wiring at the 3 wire plug to the MAF with voltage at the black wire around 9 volts &red at -5
of Greg's Orange Auto on January 25, 2012
well your on the right track. you need a pwr wire a grd wire and a 5v ref signal. if you can't do that try a sensor if cleaning helped a new one may be the answer

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