SPEEDOMETER TROUBLE AFTER CHANGING INTAKE MANIFOLD GASKET

1999 GMC Jimmy

Tiny

GARY KRUEGER

October, 14, 2012 AT 6:22 PM

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

17 Answers

Tiny

KHLow2008

October, 14, 2012 AT 6:34 PM

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

Tiny

GARY KRUEGER

October, 14, 2012 AT 7:15 PM

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

Tiny

KHLow2008

October, 14, 2012 AT 7:35 PM

Try checking for trouble codes first.

Tiny

GARY KRUEGER

October, 14, 2012 AT 8:06 PM

THERE ARE NO TROUBLE CODES

Tiny

KHLow2008

October, 14, 2012 AT 8:32 PM

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

Tiny

GARY KRUEGER

October, 14, 2012 AT 8:57 PM

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

Tiny

KHLow2008

October, 14, 2012 AT 9:56 PM

It should not but then again coincidences do happen.

Tiny

GARY KRUEGER

October, 14, 2012 AT 11:38 PM

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

Tiny

KHLow2008

October, 15, 2012 AT 8:10 AM

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

Tiny

GARY KRUEGER

October, 16, 2012 AT 1:42 AM

THE ENGINE IS A 4.3 L

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