Lots of smoke out exhaust
 

It seems like shortly after converting to 100% bio, my truck started smoking BLUE smoke at idle either in neutral or in gear. It does not clear up if I race the engine in neutral. It does APPEAR to clear up when I run it down the road (unless I just can't see it through the rear view mirror) The first time it did it, I filled the fuel filter with Diesel Kleen and it cleared right up for a few days. Now it's back. Any suggestions? I have original IP and injectors 167K miles. :-bangheadThanks Tom

Pretty nice mods list. Did you turn up the IP any? Might just be time to have the injectors rebuilt.

Any other symptoms... hard starting, oil consumption, etc?

I believe you are right about the injectors. It idles pretty good and runs at cruising speed very well. I turned up the IP when I installed the Banks. I am installing "G" injectors this week. Thanks Tom