Okay so i got 110,000 miles on my truck and run fuel additive in every tank pretty much. My issue is that my engine goes running perfect: balance rates in check, sounds good, no diesel in out or white smoke. But then at random times i will get engine knock at idle and a bad balance rate of about 8 on one injector. but doesnt really smoke white except a slight haze when cold under slight acceleration, not idle). But then 10 minutes later it runs fine again... my question is how long can i run this until serious engine issues. i just put in my new trans and dont want to spend a couple more thousand till at least Christmas hopefully. Any knowledge is appreciated...