Porsche Enthusiasts Club Forum

my 944 S2 speedo stops and starts intermittently at different speeds. Is it replacement speedo time? Or is this a simple fix?

Thanks,

I have the same problem but as my mpg meter also has the same problem - I think its probably the speed sender rather than an instrument problem per se. Haven't had a chance to look yet - anyone know where the sender/transducer is?

Doesn't the speedo signal come from one (or more...?) of the ABS sensors on an S2...?

Sender unit on the g'box I believe.

I had this problem on my S2 when i bought it 5 years ago. it was the sender on the gearbox. it was a simple and suprisingly cheap fix.

Cant get much better than that! Thanks!

replaced the sensor today and now working perfectly! thanks

ok, well not quite perfectly. 30mph on the dial is more like 36/37 ?!

Most manufacturers normally over-estimate, but you say yours is reporting slower than your actual speed?

yes, 30mph on the clocks is more like 40mph.

I was thinking of just removing the perspex and twisting the needle backwards by the right amount.

Seems more like a bodge than a fix though.

You might find it's a non-linear fault, so you'd only be making it accurate for 30mph. In other words, it could be out by a percentage, not by a fixed speed. So your sensor might be putting out too much voltage for the speedo, or perhaps the speedo is also worn out, and responding weakly.