Ok guys Ive seen alot of these threads but nothing so far that pertains to my vehicle. I have a 2002 chevrolet silverado 4x4 standard package 4.8L. The problem im having starts like this, When i decide to get into the throttle hard and it drops to 3rd gear when it gets around 3500 rpms and or about 80 mph i get a service engine light thats flashes, this being my p300 or random misfire code. I just changed out the plugs with new ac delco platinum plugs. I cleared the codes with my code scanner and so far i havent drove it enough for it to come back, I have a gut feeling that it will come back and i was wondering if anyone else has expirenced this problem or multiple of these problems and could give me some places to look. Thanks