eratic speedometer

[pos-subagoo]

my speedometer on my 93 impreza is way off when the needle does register it is about 15-30mph to fast it also sometimes just goes right up to the 140mph mark and when its not doing that its flying back and forth between like 50 and 80mph. also sometimes if i am driving slow like when i am pulling in to my driveway and shut the car off the needle is pointing at 80mph. Does anyone have any idea what could be causing these problems? is this a diy job or should i not even bother?

 

thanks

[coloradosubarules]

Sounds like you have an electronic (not cable driven) speedo. I would take it to the dealer and have them tell you what is wrong with it. Most Speedo jobs are not DIY because as a civilian, we do not have the recalibrating knowledge or equipment.

 

 

Hope this helps. I'm sure someone will correct me if I am wrong.

[PAezb]

my speedometer on my 93 impreza is way off when the needle does register it is about 15-30mph to fast it also sometimes just goes right up to the 140mph mark and when its not doing that its flying back and forth between like 50 and 80mph. also sometimes if i am driving slow like when i am pulling in to my driveway and shut the car off the needle is pointing at 80mph. Does anyone have any idea what could be causing these problems? is this a diy job or should i not even bother?

 

thanks

Sounds like you may have a bad VSS (Vehicle Speed Sensor) or Speedometer Head - search this forum for "speedometer" and you'll find lots of info on this topic.

 

I don't know what the 93 Impreza's used to drive the speedometer but it's a safe bet that if it does'nt have a speedometer cable, then it is using a electro-mechanical VSS to send inpulses to the ECU and Speedometer Head. If it's similar to my 96 OBW then the VSS should be simple to replace. See if your local library or auto store has a Haynes manual handy.

 

Paul