I have been told there is a sensor plug that is black instead of the usual blue colour,
Its made by bosch, and reads out a different value of resistance,
Roughly the blue gives 1,300 ohm, while the black gives 3,300 ohm.
I have been given these figures, not sure of their accuracy.
Does anyone know why there is a different plug, and would it have any benefits over the original?
rather than fool the ecu into thinking the engine is cooler than it is, fit a cooler thermostat (same price as sensor) which is 10 degrees cooler and will give safer power gains along the same direction as your black sensor (which i doubt is different)
might as well do it right.
the stat is from a cally turbo with aircon and is marked 82 degrees - part number 90486126
The black temp sensors should be fitted to Astra GSi's (with traction control) and senators.
The black sensors have 2 sensors inside them, therefore if you measure across the two terminals you are measuring the 2 sensors in series thus double the value. But if you measure from chassis to a pin it will measure the correct sensor value.
If the cars meant to have a blue sensor then you can fit a black sensor if you happen to have one. (no benifit) but you can't the other way round.