I have an autometer phantom electrical oil gauge and recently my pressure has been dropping very quickly when I get on it. The pressure always reads fine when at idle or normal driving, but at WOT when it reaches 3K, I notice the needle suddenly slam down to almost 0, then jerk around and bounce a bit until I let off the gas in which then it will go back to around 50psi of pressure. My car still runs perfectly fine and pulls very hard. Like I said, it maintains healthy pressure at idle (at least 25psi), and the pressure rises as I drive normally, but when I get on it at WOT it suddenly drops very low, very fast, then bounces back up when I let off the gas. When I rev it in nuetral the pressure rises as it would normally. I have also noticed when I start the car the needle will jerk back and fourth from high to low pressure as the starter is turning, and once it starts it reads normal pressure. This is an autometer electronical gauge which I installed about two years ago. The gauge came with a new sending unit as well. Could it be maybe a faulty sending unit or a bad wire/connection? Or could there be something seriously wrong with my oil pressure? The car runs as it always has; perfectly fine. The gauge has been doing this for about a week now and the car is still fine.