Mechanics

CHEVY MAP SENSOR

1988 Chevrolet Truck

Engine Performance problem
1988 Chevy Truck V8 Two Wheel Drive Manual

I have an 88 2500 chevy 5.7 fuel injected. It won't run with the map sensor plugged in. I did vcgs plugs wires coil fuel lines and filter but it only runs if I unplug the map it doesn't run good but it runs. HELP PLEASE
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Rickm111
May 9, 2008.



Do you have a check engine light?

Check the MAP sensor reference voltage and return see below


http://www.2carpros.com/forum/automotive_pictures/12900_MAP_1.jpg


Rasmataz
May 9, 2008.
Tried New MAP SENSOR still won't run unless it's unplugged, engine light cwas on when I bought this thing.

Tiny
Rickm111
May 9, 2008.
Test the MAP sensor connector wires for short and open to and from the computer-

Rasmataz
May 9, 2008.