[Paulporsche]

Have you checked your fuel and control pressures yet?

As Pat mentioned, you need a gauge to check your cold and warm control pressures, your fuel pressure and your residual fuel pressure.

You also want to make sure all ignition components are up to spec.

Let us know the number of the WUR you have and the pressures you get at the ambient temperature you tested. We can then compare them with a chart for a 79.

Until you get a test gauge, you can try loosening the big air bypass screw and see what happens. Loosening it should raise your revs.

I don't know where you are located but here in Toronto around this time of year, your cold start should raise the revs to about 2500 or so at first and then gradually lower them to about 900 after about 4 minutes or so. This will give you an indication for now, without gauges, if your WUR is operating about as it should.

You should also verify your fuel mixture is within range, as this also affects idle speed.