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1988 Chevy Truck map sensor

Tiny
RICKM111
  • MEMBER
  • 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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Friday, May 9th, 2008 AT 2:39 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light?

Check the MAP sensor reference voltage and return see below


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

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Friday, May 9th, 2008 AT 3:29 PM
Tiny
RICKM111
  • MEMBER
  • 2 POSTS
Tried New MAP SENSOR still won't run unless it's unplugged, engine light cwas on when I bought this thing.
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Friday, May 9th, 2008 AT 3:49 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Test the MAP sensor connector wires for short and open to and from the computer-
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Friday, May 9th, 2008 AT 4:04 PM

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