The problem was a collapsed lifter. The engine also had low oil pressure. - Replaced cam due to damage from lifter - Replaced lifters - Replaced oil pump Car is now running well!
Ahhh yes, the good old lifter fail on the l98. Good old GM.. I had 2 collapse and replaced them with ls7 lifters as well as a new diff as that failed, a new oil pump as that failed, timing chain done at 93,000 cause that failed, New harmonic balancer cause that failed( tore off itself) the list goes on.By far the Worst car ive ever owned and ive owned some old shit boxes and they are far more reliable then my SS..