More datapoints on my ur-Q

[Douglas Quebbeman <dhquebbeman@theestopinalgroup.com>]

I hope everyone had as great a weekend as I did (or better!).

I've collected some more data on my ur-Q's running problems.

The compression test, performed on a warmed-up engine, yielded
about 100-110psi per cylinder. While I had each spark plug out,
I looked inside at the piston tops. Lots of deposits on them,
they look like a strange combination of carbon and petrol-on-
its-way-to-becoming-pure-carbon. Plus, I got a lot of strange
yellow powder blowing out each cylinder (I didn't get the
adapter in there properly on cylinder #2 at first, and saw
this stuff, so I removed the adapter and cranked). What is this-
the dye they put in the gas, all dried up? Ya know, this car sat
for over a year...

Anyway, next, I ran the ECU tests as described on Scott Mockry's
web page. It didn't specify the duty cycle to expect at idle, but I was
getting about 50% (44.9 deg). When I manually closed the full-
throttle-enrichment switch, the reading jumped up to 69.1 deg.
When I disconnected one wire to the idle switch and closed the
full-throttle-enrichment switch, I got the same value. At first, this
led me to consider a problem with the idle switch. But as soon as
I disconnect the switch, the idle speed increases.

So I'm guessing the idle CO isn't set right... but before we can get
there...

The idle speed is high, about 1050-1150rpm. And the idle speed 
screw on the throttle body has been mangled beyond use. I'll
probably have to drill it out to get a new one in.

Anybody know the nitty-gritty on idle adjustment screws? ETKA shows
035.133.432 for the screw and 035.133.144A for the screw w/gasket
(o-ring?). For the 5ktq, it gives 035.133.432A. 

And, anyone got a spare ur-Q idle adjustment screw?

Lastly, will a long, thin-blade screwdriver work for the CO adjustment on
the air metering unit?

As always, thanks in advance.... -doug q