My problem is 2 fold. First i was trying to do engine compression test I grounded plugs and did it. now it will not start. No codes, has spark. not getting gas. What in the world could have happened. Second problem is my oil light is coming on when engine starts to heat up from cold at an idle. goes out when it revs. Plenty of oil. My engine ran out of oil from oil cooler failure i have put 700 miles on it since. am guessing engine is starting to fail, oil pump first which is what doc weaver says will happen first.