Try turning the CO adjustment screw for best idle and see what that does.
Then turning that screw out (CCW) should lean the CO and the engine should
become more responsive.
Adjusting that screw should have an effect on off-idle response too AFAIK.

Do you have a CO analyzer at your shop?
Do you analyzer how rich the engine is running by examining the spark plugs
at different times, like after a WOT run then turning the engine off to see
what color the spark plug tips are, or after a cruise down the expressway,
etc.?

You can, or should be able to, hook your VOM in series up to the Fuel
Pressure Regulator to read it's voltage.

Good luck,
dave
(One out of many daves)


"Rex B" > wrote in message
...
> OK guys, here's where I'm at now with this (formerly) dead VW:
>
> After going through everything from air cleaner to intake, repairing what
> little I could find wrong, replacing all suspect vac hoses, and fixing one
> vacuum leak, I got it where I could drive it - barely. It's obviously
> running way lean, because once I get the throttle into the WOT enrichment,
> it wakes up immediately.
> I know the rice-rocket shop turned the fuel distributor adjustment
> screw a bunch, not knowing what they were doing. My question is, does that
> have an effect on the basic running mixture (as opposed to idle only)?
> Can I expect to crank the 3mm adjustment screw a little at a time and
> bring the mixture into a drivable range?
> I know the correct way to do this is with an ammeter reading the o2
> sensor circuit, but the o2 sensor does not get hot enough to operate for
> this purpose. Remember this is a race car, and most people racing these
> effectively bypass the o2 sensor and treat it as a straight CIS system.
> --
> - -
> Rex Burkheimer
> WM Automotive
> Fort Worth TX