[Razorback1980]

One other thing I thought of that might cause this is a bad oil pump drive gear. As Rudidelange already mentioned, the oil pump is metal gears and they almost never go out, so that is probably not the problem. There is a drive gear that slides on the crankshaft that could be stripped or as Rudi also suggested loose. It is VERY IMPORTANT to make sure the bolt on the front of the crank has the right torque (I think it's 150 ft lbs if I remember right) as that bolt is what tightens the pieces that drive the oil pump. Of course what Vaughn suggested was another simple thing I didn't think about...you did change the oil right? Hopefully you did that before you cranked it. Let us know what you find. Again clarks-garage.com is an excellent source for repair information.