SeaDweller

OK, here's what we've been waiting for (I guess I should speak for myself). 8)

I tested the system both cold and warm, with the original and new (correct) vacuum hose routings, and here are the results:

Initial cold test (with electrical connections disconnected):

1. I connected the CIS gauge, ran the fuel pump, purged the lines of air, and obtained the following cold values: (a) the system pressure is around 65PSI and (b) the control pressure is around 28PSI.

Next, I started the car with the following results when warm:

With the new (per the diagram) hose routing:

1. With the new hose routing, getting the car to run was very difficult. I finally was able to start the car and get to the back so I could keep it running. The control pressure was 50PSI with the car warmed up.
2. I removed the vacuum line from the top of the WUR, and the pressure DROPPED to 45PSI, and the engine ran slightly better.
3. With the new vacuum routing, the engine did not run well.

With the original (incorrect) hose routing:

1. The engine ran better, and I obtained a value of 35PSI with the engine warm.
2. I removed the vacuum line from the top of the WUR, and the value INCREASED to 45PSI, causing the engine to run worse.

I also checked the operation of the Thermovalve, which operated properly. Also, the system held pressure, therefore the accumulator seems to be functioning properly.

Now, based on some values that I obtained, I have some comments and questions:

1. The system pressure is said to run at 80PSI, yet mine is running at 65PSI. Could this be an issue?
2. The cold system pressure is said to run at 32PSI-35PSI, yet mine measured at 28PSI.
3. The warm system pressure is said to run at around 50PSI, which mine does exactly with the new (as per the diagram) hose routing, yet the engine runs poorly. Could this be a simple mixture adjustment?
4. The warm system pressure runs what seems to be low (35PSI) with the original (incorrect) hose routing, yet the engine runs better. Could it be that the mixuture was "adjusted" to compensate for an improper WUR value due to the incorrect hose routing?

I'm going to do some work to the boat (it's getting very angry at me for spending so much time on the Porsche), but I'll check back to see what the consensus is on my results before I move forward. My initial thoughts are that the mixture is out of adjustment, so what do you think?

Thanks again everyone!!

Michael