i removed the dash and resoldered everything behind the gauge.
i would say it did SOME difference,but not fixed it. now it sometimes works fine, sometimes x2 and sometimes something in between. i've noticed it jumping around while sitting at a traffic light. there's a big resistance behind the gauge, could it be knackered? should i try to replace that one? if that doesnt work i'm tossing it and replace it with a Koso motorcycle thingy, my mate's got one and it's excellent