View Single Post
  #2  
Old 10-31-2012, 09:20 PM
drivinfaster's Avatar
drivinfaster drivinfaster is offline
bimmerfest Supporting Member
Location: in the sticks you piney
 
Join Date: Nov 2007
Posts: 10,638
Mein Auto: rescued bmw's
how many miles??

it's rather odd for hc & nox to be high at the same time, but i would look at the basic maintenance items like plugs and filters.

i'd also check the egr operation for restriction/carbon build up.

o2s would be a a good idea as well depending on the mileage.

seafoam would also be suggested, again, as a maintenance.





df
__________________
Reply With Quote