Quote:
Originally Posted by locovino
Hey thanks for the suggestions Jed.
I'll start running down the list of items you note to try to lower the NOx levels. Good to hear that it may be just high combustion temps.
With respect to the over limit HC levels, I had read in another thread that it may be better to fill the tank with 87 Octane fuel before test to allow for full combustion. Does this make any sense? I have been using 89 Octane fuel for the testing so far.
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It might help. Lower octane fuel does burn "easier" than higher octane fuel. But still, your HC levels are only slightly elevated. Once you fix whatever it is causing your NOx levels to be high, there's a good chance the HC levels will drop down quite a bit.