5ktq runs better- still too rich though?

[Huw Powell]

> The saga of the 5ktq that I'm dragging slowly back into the land of the living continues. It had many rough-running issues, most of which I've posted about in the past.
>
> Well... much quieter now, hits 1.2 bar boost where before only 1.0 and plenty of turbo whine were available. Nice smooth idle, consistently. But the exhaust at idle still smells somewhat like my SU carbed Datsun with the choke on. (Not the most scientific exhaust analysis, I know...)
>
> So what's left? Changing plugs, air filter, o2 sensor, downpipe have made a night-and-day difference in the drivability- but if I'm still blowing a sooty deposit on the pavement when it starts up, is the last thing left to fiddle the CIS mixture screw?

Don't fiddle with that screw unless you are measuring *something* to see
what effect it is having.  I'm not exactly sure what you are supposed to
measure on a 5ktq, perhaps the CPA current just like CIS-E?  I also
don't know the "rest" current it should oscillate around, though it is
probably 10 mA.

First, why not measure the OXS output voltage (easier) at warm idle and
see how it looks?  It should oscillate around .5v every few seconds.

--
Huw Powell

http://www.humanspeakers.com/

http://www.humanthoughts.org/