M103 Running Rich

[JamesDean]

Hi All,

So my m103 is running a bit rich. You can tell at the exhaust, its pretty strong!

I am trying to think of all the places that might be causing this behavior.

1) Lambda Tower setting
2) EHA
3) EHA Control Issue
4) Oxygen sensor

A few months ago I replaced all the rubber above the intake manifold as well as the fuel injectors and seals.

I believe I set the lambda tower so that the duty cycle at the X11 port read 45-50% or so.

Just starting a discussion on the topic. I've not had a chance to do any investigating yet. I still manage to get 23-24 MPG while driving 75-85 MPH on my commute.

--Kris