Hi I need some experts on here to chime in and give some advice. About 1 month ago I was out and the oil pressure light instantly came on and the van started jerking and misfiring so bad that it would not stay running. Oil level was fine. Oil light had never been on before just instantly came on and instant misifire. Van will not run long enough to check anything. The engine seized on me after I rebuilt the oil pump. I was starting it off and on and then it seized. So I replaced the main and rod bearings thru the bottom while the motor was still in the van. Not as hard as one would think. The crank looked fine and I plastigaged it and it was still within spec. Put it all back together and still the same problem. Oil light on and still bad misfire. Checked rocker arms all were tight but there was a few push rods a little loose, Not enough to hurt anything I would think. Could it be the camshaft bearings? Or bad lifters? Would bad lifters cause no oil pressure at all. Head gaskets were replaced back in the spring and van was fine until instant oil light about 1 month ago. Also took fuel rail up and the front 2 fuel injector holes near drivers side were full of gas to the point of coming out of the hole. What would cause that to happen? Really do not know what else to do in short of pulling the engine and rebuilding it. Please reply as soon as possible. Any advice is great advice to me. Also it has a new oil pressure switch in it after this happened. Also is there anyway that a camshaft sensor or crankshaft sensor would cause.

UPDATE!!! I may have found the problem. Took lower intake off and pushrods and lifters. Stuck my finger in one of the holes to see if camshaft was lose. It is broke. I could touch it and move on the back in toward the oil pump drive gear and It was tight toward the front of the engine. So that explains the bad misfire. Also explains why there was no oil pressure. Duh the cam was broke before the oil pump drive gear= noway to get oil pressure!!! Now pull the engine and replace the cam and probably a few more things.

This is not unheard of with the hollow camshafts. I have a theory that the intake manifold coolant leaks can contaminate the cam bearings causing a tightness, contributing to this failure.