New poster here, and let me start by saying the information I've received just from searching the forum's has been invaluable, so thanks for what you've already done!
Whew, now that that's over I have an issue I hope someone can help me. I ran a pressure test (actually three) on my CIS system and now that I have the pressure readings, I'm not sure what they are trying to tell me.
First, I have a 79 911SC targa US model that I purchased a year ago. I have had a lot of fun in it, but it has the infamous hard warm start issue. If I go somewhere and turn off the engine and attempt to leave within thirty minutes or so, or even five minutes, it will either not start or takes a very long time to start. It has gotten to the point where I don't go anywhere, but rather leave the house on long drives but don't turn the car off until I get back home. That's no way to drive a Porsche! It is one of those winter projects I promised myself I'd get to, but here it is spring and I'm just now working on it. Nevertheless, the results of my tests at 57 degrees F and 14 degrees C are:
System pressure (valve shut) 5.0 bar
Cold Control pressure (valve open, WUR unplugged) 2.0 bar
Warm Control Pressure (valve open, WUR plugged in) 2.8 bar
Residual pressures : 2.2 bar after 2 minutes; 1.8 bar after 5 minutes; 1.6 bar after 10 minutes; 1.5 bar after 15 minutes; 1.4 bar after 25 minutes; 1.3 after 35 minutes and 1.2 bar after 40 minutes. Also, the resistance of the WUR read 25.7.
I believe this means my WUR (045) needs to be rebuilt, but I've read some threads that suggest those readings are OK so I'm a little confused. Any help?
And here's a picture....
