SPEEDOMETER TROUBLE AFTER CHANGING INTAKE MANIFOLD GASKET

  • Tiny
  • GARY KRUEGER
  • 1999 GMC Jimmy

THE SPEEDOMETER WAS WORKING FINE UNTIL I CHANGED THE INTAKE MANIFOLD GASKET, CAP, ROTOR, PLUG, WIRES, FUEL INJECTORS, AND STATER. WHEN I START TO DRIVE THE SPEEDOMETER IMEDIATLEY JUMPS UP TO 29 MILES PER HOUR AS SOON AS I START TO STOP IT DROPS RIGHT BACK TO 0. TRIED REPLACING VSS BUT THAT HAD NO EFFECT. WOULD APPRECIATE ANY HELP THANKS GARY

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Sunday, October 14th, 2012 AT 6:22 PM

17 Replies

  • Tiny
  • KHLow2008
  • Expert
  • 41,997 posts

During removal installation of the manifolds, wireharness have to be removed and probably some ground connections too. Ensure they are correctly and securely reconnected.

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Sunday, October 14th, 2012 AT 6:34 PM
  • Tiny
  • GARY KRUEGER
  • Member

WENT OUT AND CHECKED ALL CONNECTIONS COULD NOT FIND ANY LOOSE OR INCORRECTLY INSTALLED ANY OTHER SUGGESTIONS WOULD BE GREATLY APPRECIATED THANKS GARY

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Sunday, October 14th, 2012 AT 7:15 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,997 posts

Try checking for trouble codes first.

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Sunday, October 14th, 2012 AT 7:35 PM
  • Tiny
  • GARY KRUEGER
  • Member

THERE ARE NO TROUBLE CODES

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Sunday, October 14th, 2012 AT 8:06 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,997 posts

If no codes are thrown and speedometer is not working, problem should be at the meter cluster.

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Sunday, October 14th, 2012 AT 8:32 PM
  • Tiny
  • GARY KRUEGER
  • Member

THE METER CLUSTER WOULD DEVELOP A PROBLEM JUST OUT OF THE BLUE AND JUST SHOW UP AFTER I CHANGED INTAKE GASKETS ETC? THANKS GARY

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Sunday, October 14th, 2012 AT 8:57 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,997 posts

It should not but then again coincidences do happen.

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Sunday, October 14th, 2012 AT 9:56 PM
  • Tiny
  • GARY KRUEGER
  • Member

IS THERE A WAY TO TEST THE METER/ CLUSTER? IF SO HOW DO I GO ABOUT DOING IT. THANKS GARY

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Sunday, October 14th, 2012 AT 11:38 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,997 posts

The trouble code P0500 diagnostic procedures should help you on the diagnostics.
Which engine do you have?

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Monday, October 15th, 2012 AT 8:10 AM
  • Tiny
  • GARY KRUEGER
  • Member

THE ENGINE IS A 4.3 L

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Tuesday, October 16th, 2012 AT 1:42 AM

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