The temp gauge on the Saph has started giving strange readings - fine when sitting in traffic, as soon as you start moving it goes down and down the faster you go until the needle's on the bottom.

Any ideas? Presumably there's a voltage regulator attached to it - could this be breaking down?

Cheers,

Si

 

Tempurature gauge on the dash works off a stub unit which sits near the big ECU temp sensor on the head......

Might be worth having a new one as they are about 10quid. Smit.

 

does the fuel level move with rpm too? if yes its the regulator on the back off the clocks, it blows easily during welding!!!, the tempsensor usually fooks up after a boil up!

 

Sounds like the temp sensor on the side of the head is fooked Simon.

 

what does the ecu temp sender do?

you can get this problem if coolant is low, or there is an air trap around the sensor. not enough flow from water pump at idle, but is during driving.

also, stuck open thermostat at this time of year will have the same effect

 

mine went haywire like that - kept dropping right down once the motor was warm - I simply cleaned the sender connection (bit fidley) and it worked great for a while... didn't drive it for a while and had to redo it to make it work again... so got a new sensor sitting here ready to go in.