I cant yank the chip it runs the stage 2 injectors..you pull it and the truck wont even run. But anyways I can run it on IDS if I bring it home from work one day I know how to identify which cylinder is misfiring but the air hissing doesnt make sense. I have already ran compression test multiple times before installing injectors and cant swap injectors cause they wouldnt be same as one another at all. Stock early 99 injectors are 120cc these are 175cc and these injectors are single shot, originals are split shot. May have screwed up by hot rodding my truck but the single shot is suppose to use way less high pressure oil, get better fuel mileage and pull better with lower egt's.....Im going to pull injectors and make sure I dont have a cracked nozzle or a copper washer didnt fall off. All I can think of at this time or even broken oil ring.