Were i work we do some tuning and have a few fuel pumps there. I'll try1 of them. It has the miss on idle but when you increase the rpm above about 2000 the miss doesn't seem to be there but yet still not much power????

I'll try the injector tonight to see if its opening. The plugs are all the same looking. There's no difference in wear or anything that shows a bad cylinder. I cant remember what heat rating they are but they are Iridiums. Could the engine be getting to hot and causing them to break down because of a low heat rating?? They were changed before i got it