[tirwin]

For 83 US model @ 20°C, the range for CCP should be 2.0 - 2.4 bar. That means you are overly rich on cold start for that temp. Lower pressure, richer mixture. Pressure starts low at cold start for AFR to be richer than normal and leans out to stoich AFR for normal operation. At 1.8 you are slightly rich at cold start.

3.4 - 3.8 is fine for WCP.

As Bob said, don’t muck with the mixture if CCP is off. When you change the mixture you are affecting the IDLE mixture. So if you make it richer or leaner for a cold start you can be affecting AFR at cruise and WOT.

If you are certain with your WUR tests, then get in touch with Tony and have him re-calibrate your WUR. If not, double check.

Once WUR checks out, then adjust idle mixture, timing and idle rpm following factory procedure.