Dan n Friends Help me trouble shoot my DPR trouble shoot tool.

[roccit_53 at scirocco.cs.uoguelph.ca (C Boyko)]

>
> Also if I'm using the O2 when it's being adjusted I should also
> probably make sure I have a good O2 and not an old one that needs to
> be replaced(like I have now) to get good readings?

Well, for the DPR to work properly, a good O2 sensor is always best, but
DPR is just an adjustment over and above the basic CIS, based on info from
the O2 sensor. A tweak on the fly as it were.
>
> What happens if I unplug the O2 when I'm running?  I remember
> adjusting my old rocco many years ago when we still had Echeck in the
> state. We unplugged the O2 and adjusted the settings by ear to pass
> the Echeck. 8-)

I'd tune with the O2 sensor hooked up and use the meter. (I think my target
number is about 5.5 mA plus or minus, but I'll double check that, I have a
terrible memory for numbers. Give me a Latin plant name and it's in there
for life, but not numbers...) Anyway I had a few nice professional mechanic
types try to tune my straight CIS car by ear, and that's why I bought a
wideband. :)
Mind you, that car was untuneable in the state it was in, due to a bad fuel
distributor. And of course, that one also had no DPR current to measure
either. Ear is fine, numbers are better.
Cathy, still on coffee numero uno...