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Old 09-13-2010, 07:20 PM   #1
Scooby Specialist
Member#: 233957
Join Date: Jan 2010
Chapter/Region: MAIC
Location: Cumberland,MD
2012 STI Hatch

Default Speedometer bouncing around

So my speedo starting bouncing around today.It is so random as to where it bounces I have no clue what to make of it.I have never seen this before.Also,certain times when im sitting still and rev it,the speedo will mimmick the tach when i rev it.I am not able to go get any CEL's read because I already have one from way back that I need to get taken off when i go get a re-tune.So any ideas what this is,or anyone had this same thing happen?Any help would be greatly appreciated,thanks guys.
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Old 11-28-2010, 06:04 AM   #2
Scooby Newbie
Member#: 70305
Join Date: Sep 2004
Chapter/Region: MAIC
2004 WRX
Aspen White


sounds like speed sensor
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Old 11-28-2010, 02:44 PM   #3
Scooby Guru
Member#: 118209
Join Date: Jun 2006
Chapter/Region: MWSOC
Location: North Dakota
2015 WRX Limitec


check your alternator... I've had more than one speedo/tach that acted up because the alternator was spewing out massive amounts of noise/AC.

(easy check would be take off the belt on the alternator and start it up, see if it still does it.
rkramer is offline   Reply With Quote

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