Hi

- I've got 3 aftermaklet gauges installed in my MR2

- Ones boost, ones oil pressure I think

( Increases to about 6 on the dial with use of the accellerator

) and the other I don't have a clue about

- It flicks upto 15

/ 16 on the dial when you turn the ignition on and stays there not really doing alot.

Anyone any ideas of what it may be for

?