Hi, I have an '89 GT and I've been getting really weird oil pressure readings. From start up the pressure seems fine and sits a little below the halfway mark on the factory gauge, but when I accelerate or beat on it the oil pressure seems to drop off very drastically. The motor is almost all original except cold air intake and a flo-tech exhaust setup. I don't hear any ticks or knock in fact for an engine with 100,000 miles it sounds pretty healthy. Does this sound like an oil pump problem or a bearing problem? I have also heard of bad sending units that send faulty readings...any thoughts would be greatly appreciated. Thanks!