1989 Chevy Truck my S-10 will idle high

Tiny
TRUCKLOVER76
  • MEMBER
  • 1989 CHEVROLET TRUCK
  • 6 CYL
  • 2WD
  • MANUAL
  • 167,000 MILES
When I hook up my m.A.P sensor my truck idles hig then low then stalls. It runs fine when m.A.P sensor is disconnected. What could the problem be?
Tuesday, February 5th, 2008 AT 1:11 PM

1 Reply

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
You may have a bad map sensor. Also you should hook it up while the car is off then turn the car on and it should stall if its ok. High idols usually mean cracked or disconected vacuum hoses
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Tuesday, February 5th, 2008 AT 1:48 PM

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