Based on your pics earlier i'm thinking you never cleaned the engine bay,is there any drought of any kind in your area,personaly a good start will be to get a couple cans of MAF cleaner and clean all the map sensors,iat,tb,cact,,anything that has a harness connector like the spark plug connectors,they get all kinds of dirt and oil buildup overtime,you mentioned you changed the plugs,did you also change the boots on the coils? only a suggestion cause every little bit helps. Z