My CIS test numbers, diagnosis please.
 

Ok I have the JC Whitney tester and ran some tests last night. My tester does not look the same as the Porsche tester but I am sure it's principle is the same.

With the valve closed and the unit connected and bled between the WUR and Fuel distributor I have the following numbers.

Vave closed/pumps on/ 81F(27C) temp/ = 87psi/6 bar
Valve open/pumps on/ 81F(27C) temp/ = 58 psi/4 bar (huh???)

Fuel delivery rate/ one minute / valve closed = 235cc's
Fuel delivery rate/ one minute / valve open = 235cc's

I cannot figure out how to test warm control pressure, it says to remove the governor plate and jump a relay underneath it? Where the heck is that? Anyway how do my numbers look? Thanks guys.

Anyone?

Here's what I know (or at least THINK I know). The two pressure numbers you are looking for are the Control Pressure and System Pressure. Control Pressure is what is regulated by the WUR. Control pressure changes as the engine warms up. So, when evaluating the WUR, you're watching the pressure change during the first few minutes after the engine is started. And the starting control pressure, compared to the temperature of the atmosphere.

With the valve open should'nt it be delivery less fuel?

I dont know. The book did not even say to test both ways, but I figured any info is good info.

With a cold motor, hook up the tester. Unplug the WUR electric plug. Do the sys pressure. This should be high pressure. Then switch the valve. this would be the cold pressure. Should be lower. Then plug in the WUR and wait with the ign on for 2 mins. The pressure should rise. This is your warm pressure. Compare pressure specs to what the book says.

Thanks blown, very different instructions than the book but hey. Thanks again.