[masraum]

Originally Posted by A930Rocket

I had it on my battery maintainer, so maybe that’s it?

I’ll leave it off and test it again tomorrow.

I installed a dedicated water temp, oil temp and oil pressure gauge on this car.

Sweet! I've installed gauges in lots of cars over the years, even basic, pedestrian cars. My Boxster's got a water temp gauge, a tach, and 2 speedos (digital and analog). It would be fairly easy to install a voltmeter if I could find a good place to put the gauge. There's nothing to a Voltmeter. Installing oil pressure is much more of a pain. My car has an idiot light, so I'd have to install a T to keep the idiot light and have the pressure gauge. I believe some folks have installed a pressure gauge in the wart on the dash after taking out the stopwatch which makes a ton of sense. I honestly don't trust that the water temp gauge is undamped. I think that a lot of gauges these days are heavily damped. When miatas first came out they had a real, honest temp and oil pressure gauges. Then mazda made them non-linear and heavily damped. So the temp gauge, for instance would read cold - middle/good - too hot. I suspect lots of companies have done that because it saves them lots of time and money. I really miss the gauges out of my old '88. They were all accurate. I could tell the temp, oil pressure, oil level, etc... all at a glance.