Hi all, im running an Audi gauge cluster with the EJ conversion, and I seem to be getting incorrect readings. It reads really hott, but the engine or any of the water pipes arent hot.
I know there is not air locks in the system, and Im getting water circulation, so was wondering if the sender unit is incorrect?


mat

Possibly not. Your best bet is to buy a new aftermarket sender (VDO etc). Go to an autoshop and find out the resistance values for the audi. Then pick a sensor that roughly matches those values and is the same thread as the suby sensor.

Scooby senders are 1/8 BSPT
Most VW VDO senders are 1/8 NPT which is 27 teeth per inch (or is it 28, anyway there's only 1 TPI difference between them, you're only using approx 12mm of it anyway)

You can use the VDO sender without retapping or using an adaptor. Just don't overtighten as with any tapered thread.

I learnt that a lot of modern cars (includes Subaru) use temp gauges that are 'dead' between 70 & 100°C (approx). This may be true of Audi too.

HTH