1989 Chevy Celebrity Intermittent speedometer

1989 CHEVROLET CELEBRITY
70,000 MILES • 6 CYL • FWD • AUTOMATIC
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MAPLECYBER
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  • 1 POST
I am experiencing problems with my car. I just bought it and driving home I noticed that the engine light was on and the speedometer was not working at all. The car would idle high at a stop or would idle rough and die. Once I got to highway speed the speedometer started working again.

I have pulled two codes from the computer. 14 and 33 which are ECT an MAP codes. I hope the computer isn't faulty.

Any help would be greatly appreciated.

Thanks:)
Oct 19, 2010 at 7:25 AM
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BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
Hello and thanks for donating


The MAP and coolant temperature sensors share the same wiring. I would suggest inspecting the wiring at both of these sensors. Ensure it is connected properly and not loose or damaged.
Oct 26, 2010 at 5:18 PM
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