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1989 Chevy S-10 why does it stall out?

Tiny
TRUCKLOVER76
  • MEMBER
  • 1989 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • MANUAL
  • 167,000 MILES
Why would it stall if the map sensor was good? It idles rough when it is connected and then stalls out. I thought it might be an issue with something connected to the map sensor but cant figure it out.
Tuesday, February 5th, 2008 AT 9:04 PM

6 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
The MAP sensor is a critical component that helps the vehicle run. You say if the electrical connector on the map is unplugged then it runs great?
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Wednesday, May 15th, 2019 AT 2:26 PM
Tiny
TRUCKLOVER76
  • MEMBER
  • 6 POSTS
No if the vaccum line is disconnected it runs fine.
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Wednesday, May 15th, 2019 AT 2:26 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Hook up a handheld vaccum to it and test it, if it still doesnt function properly replace the MAP sensor.
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Wednesday, May 15th, 2019 AT 2:26 PM
Tiny
TRUCKLOVER76
  • MEMBER
  • 6 POSTS
I just put a new map sensor on it and it does the same thing. If I hook up the map sensor vacum line it makes the truck idle rough and hesitate then if at idle it stalls.
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Wednesday, May 15th, 2019 AT 2:26 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
With the vaccum line off you are having an engine running extremely rich, and when you hook it up I belive you are getting the right amount of fuel because the engine is demanding so much, you could have a bad fuel pressure regulator, fuel pump, plugged filter or injectors.
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Wednesday, May 15th, 2019 AT 2:26 PM
Tiny
TRUCKLOVER76
  • MEMBER
  • 6 POSTS
Ty. Ill check it out
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Wednesday, May 15th, 2019 AT 2:26 PM

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