fuel injectors

[wade w]

Im still having problems with my truck. It's down to one cylinder. It was 2. but Ive had to replace the insert several times in that one cylinder. So Ive been talking with Frank about his old heads. But I still have another problem to deal with. It melts the end of the plug in that one cylinder when I hold it down long enough for it to go into overdrive. Ive had someone tell me it could be an injector problem. Does anybody know how to check them or have any other idea's. I am thankfull for all of the help you guys have given me before.