Running down the road it will start jerking like it looses power black and white smoke comes out the exhaust last time it did this i lost all oil pressure on the dash gages but still had oil pumping good

Drove it to pick feed up. Some kind of fan came on the two times I had to shut off and re- crank turn engine on no oil pressure and no fire

Oil pressure gauge at 0 when trying to start. Inoperative amp guage while running.