So my oil pressure guage just started doing this a couple weeks ago. I thought it wasn't a big deal, but then driving down the interstate the other day I noticed it was sitting flat on 0! I gave it a flick and it went back to normal. So waiting in line at Dairy Queen last night, it start twitching again. I was putting it in and out of gear seeing if there was a difference in neutral and drive. How do I go about fixing this?

https://www.dropbox.com/s/jvbybiz06kgbko1/VIDEO0039.mp4

 

Replace the gauge. Not likely it's the sensor, since the needle reacts to a flick of your finger. You can probably find a used triple-gauge set for a reasonable price - make sure you get the correct one for your year. Maybe eBay, the FS listings here, or Turbo Toys in Tampa. Takes maybe 30-45 minutes to replace, using just a few screwdrivers. See this thread for instructions on how to get the dash apart:

https://my350z.com/forum/body-interi...by-guages.html