Ive been having issuses with my truck not running right and i was wondering if you could help me out. It startz up fine but once you let it sit for a while the engine starts to shake and cut out. When im driving i hit the gas and it doesnt resond like it should. When i roll up to a stop light the oil pressure gauge will drop all the way to 0 then then engine starts cutting out. My dad and i fixed the timing on it because it was off but that didnt fix whatevers wrong with it. we checked the EGR valve and that works. i cleaned the throttle body really good yesterday that didnt make a difference. and just the other day i replaced the fuel filter because that was congested. once again that didnt fix the problem. Any help at this point would be greatly appriciated. Thanks