I have an 04 gtp and #3 cyl is missing ALOT, they have it narrowed down 2 injector, or burnt valve. My dad has been a mechanic all his life and says if you can hear it missing out the exhaust its def a valve. Wondering if anyone knows about this, also if anyone knows how to fix this as cheap as possible, but still want it done right. I live in Greenville WI. So if anyone knows somebody or a place that can do this cheap but GOOD Please let me know. Or if its possible that its somethin else. ( i plan on tearing the whole top end down and new valves and whatever else needs to be done port and polish, stuff like that.) Please let me know. THANKS!!