so i finally had a chance to work on my truck and the problem is still there. so far i have replaced plugs and plug wires,cleaned tb and maf and filter,replaced front 02 sensors(have some good ones laying aroun so gave it a shot).ive been getting random/multiple misfires,bank 1 lean and a maf code.i have looked every with a stethascope for vacuum leaks.im stumped and hate to take it to a stealership.