[wicks]

Hi all - thought I would post here in hopes of casting a wider net on a fuel pressure issue I'm having with my 964 3.6 turbo.

I had a perfectly running car (36K miles) a week ago. Last fuel related issue I had was replacement of the accumulator which solved the hot start issue I'd had.

Right now, I have a car that will start/idle after cranking up the air meter enrichment screw. It will not run without missing and generally acting starved. Very far from driveable. Before I did that, the car would start then stall immediately. So I feel that cranking up the mixture screw has really just hacked the problem to get an idle. I am able to adjust the AFR to 14.5 using this screw though. This happened after a car wash one day after the car drove well all afternoon.

I've rebuilt the fuel head with all new orings and diaphragm, did not fix. I've replaced the system pressure regulator, shimmed with same as original shims. I've cleaned out the air meter and made sure it moves freely. I've checked and rechecked all intake connections for air leaks. I've replaced all vacuum lines.

When I run the system pressure I am in range at 6.7 BAR. When I throw the tester lever to open the WUR side of test line, I get no change in pressure. I.e the system pressure is the same as the control pressure. Not even a slight change on the gauge.

Anyone with fuel pressure knowledge familiar with what piece of the system would cause this? Blocked lines is a cause I've read, but I can't figure how a line could have become blocked, and I know fuel is making it back to the tank, I can hear it.