Glad you are getting to the bottom of it. I dont think you mentioned mileage?

I'd pop and spray test all of them, replace nozzles on the bad ones and re-balance all if your mech can do that for you. Otherwise its probably easiest to just replace them with rebuilts.

Sounds as if you had a couple of dribbler's at idle.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)