92 imprezza speedometer

[archer57]

The speedometer reads approximately twice the actual speed and oscillates
wildly. It reads from 10 - 15 mph at idle with the car in park and approx
80mph at 45 - 50. However, the odometer is clocking miles correctly, and
because of this I'm wondering if the problem is something other than the
cable. Any suggestions appreciated.

Thanks,
Pete

 

[Hallraker]

The speedometer reads approximately twice the actual speed and oscillates
wildly. It reads from 10 - 15 mph at idle with the car in park and approx
80mph at 45 - 50. However, the odometer is clocking miles correctly, and
because of this I'm wondering if the problem is something other than the
cable. Any suggestions appreciated.

My first guess would be voltage. When my alternator went out, my gauges
were flying all over the place. On the plus side, I did get to see the
needle on my '95 Legacy's speedometer hit 140, a speed I've never been able
to reach.

-Matt

 

[archer57]

Hey Matt,

Thanks for the reply. I'm not sure about the alternator only because the
speedometer's been behaving this way for well over a year now. I'll check
it out though.

Pete

 

[Hallraker]

Hey Matt,

Thanks for the reply. I'm not sure about the alternator only because the
speedometer's been behaving this way for well over a year now. I'll check
it out though.

Well, I would guess that the speedometer is electronically controlled
somehow. I suppose that a malfunctioning eletronic controller could cause
the erratic needle behavior.

-Matt