I've got autogauge smoked water temp, boost, and oil pressure, and recently, my oil pressure gauge has been playing up, a tiny blip of the throttle and the needle just shoots straight up in an instant, then eventually drops straight back down, but is very twitchy, I had put it down to a faulty sender, but then my water temp gauge started being weird, the needle would suddenly drop too low when fully warmed up, and was twitching up to proper temp and back down again, with exactly the same rhythm and movement as the oil pressure gauge needle, deffo not a coincidence, could it be interference or a ground problem?

 

Cheers, Tudor...

Do they all share a common ground wire? If so then maybe it's being a bit intermittent.

I would say its a dodgy earth :)

Yeah, my thoughts too, the senders use different grounds, but the gauges share one, can't remember if I tapped into the radio loom, or ran a separate one from the chassis, I shall investigate. I just presumed the oil pressure sender was playing up, but when I noticed the water temp doing the same thing at the same time, must be a ground issue.... Cheers...