[Jaymanbikes12]

I have a 79 911 that I am having issues with the car as it warms. It starts fine and idles at approx. 1100 RPM, which drops to 900 or so within a few minutes. The car then starts to search for RPM after driving a short while and coming to a stop. Sometimes it will stubbled to the point of stalling. Once the cars is completely warmed the RPM search gradually diminishes. Here are my fuel pressure numbers. I ran the test with the WUR vacuum hose disconnected.

System pressure : 4.8 B @ 31c
Cold Control Pressure 1.6B

I ran a 10 minutes test with the WUR Connected

1M 2.2B
2M 2.4B
3M 2.5B

The pressure does not increase after 4M

Residual Pressure
@0= 2.9
@15M =1.6
@30M = 1.35

Any advice is appreciated!