First, a bit of background. I might do better if I fix the transmission
and the speedo cable. The speedo cable is broken at the tranny, and needs
a new piece to make things right. Only $80 for a 6" piece of cable. This
will get the speed sensor in the speedometer feeding to the ECU again (the
sensor is working, but because the speedo isn't it registers 0 MPH to the
ECU.)
Add to that two broken solenoids in the tranny. Easy to replace, $80
each...
Now, I appear to be getting about 12 MPG with the car...I dunno, because I
can't calculate it, because...the speedo doesn't work...
The recent inspection showed HC, CO at perfect levels for a car this old,
almost as good as new. The NOx was almost over. I think it passed by 6
points. Indicative of a plugged Cat? There aren't any other driveability
problems, the car rips along pretty well.
Now, I can't remember...to reduce NOx, do you Advance the timing, or
Retard it? Last summer I set the timing dead nuts on spec, and then played
with it slightly to get the car running smooth and get a little OOMPH out
of it, only a degree or so one way or the other.
Now, about the roof. I havent been driving with the roof on much, so I
suppose this isn't helping, either. But it just seems I wasn't putting
this much gas in it the past 3 years...
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