[Paulporsche]

Showdown,

The first thing is to make sure all ignition components are up to spec and working correctly.

Then you can move on to vac and CIS tests. You need a pressure tester with CIS fuel line fittings to do the fuel and control pressures.

You should take note of the WUR and and publish the number stamped on it. We can then help you determine if you have the correct one, and check which graph you will want to use for pressure verification.

You can do pressure and vac leak tests with the engine in the car. Not all engines lose rpm when the oil cap is removed, so it is a good but not definitive test.

Check Youtube for videos of tests done by others.

Tim has great posts on this system. Another is Tony (boyt911sc). Check for his posts on this forum, and for Jim Williams' website on CIS.

Your symptoms are not unusual for cars of this vintage, so you'll find a ton of info here if you search.

I'm sure you will get this sorted. Don't be afraid to ask questions. There are many knowledgeable people here who are willing to help.