j_polk2008

my d16y8 is putting out black smoke Any ideas on what makes them run rich and how to fix it..

turbojdmhatch

is it stock?

rpared01

someone correct me if i'm wrong, but i sound like you burning oil

cycopath

Wrong, Oil is blue, Unburned gasoline is black.

xxblazexx

sounds like you just need to retune the ecu

j_polk2008

The car is stock it has an intake, exhaust and header just the bolt ons but how would i re-tune the ecu?

rpared01

thanks for the correction cycopath, i couldnt remember which one it was at the time.

Former User

Is the CEL ON?

Start by checking for an exhaust leak around or upstream of the primary O2 sensor.

cycopath

NP. Lot of people mix it up

jdmsinglecamdelsol

my sohc zc was running rich...was getting 11 mpg went had it tuned ran great till i sprayed it

blkegcoupe

you don't need a retune or a tune if your running a stock computer when is it running rich ie; blowing black smoke, are you doing it when you hit vtec or high rpms? most likely your vavle seals are shot or any cel's?