Nick work! I have loved following this thread. The car looks awesome!

I agree with what everyone is saying. Really awesome thread and overall documentation of the rebuild. I can't say that I'm surprised that there were a few unsuspecting fixes; a proper rebuild can't go totally smooth, but I'm glad that you got it done. In case you're wanting to add any final touches, we have a newly revamped Accessories section on site. Let us know if you find any useful and best of luck with your future builds!


-Dmitry

Geez, Dmitry! How many more thousands of my dollars do you guys want? I've probably spent more on parts from Pelican than I did purchasing the car.

Glenn,

My apologies if the post sounded pushy. I just wanted to alert the users of our new section. We GREATLY appreciate you being such a loyal Pelican customer.


-Dmitry

Annnnnnd, I'm legal.

http://forums.pelicanparts.com/uploa...1475709574.jpg

Congrats Glenn

You've come a helluva long way over the past 6 yrs. This has been a great thread.

Cheers
JB

Bringing this thread back to life. The car has been my daily driver for many years now, except when there is salt on the roads. But, it is time for it to go to its next owner. I'll be cleaning up some of the age spots, and bumps and bruises it has accumulated, then putting it up for sale. Stay tuned for updates.

Looking forward to the updates! Shame it's time for a new owner but at least it served you well for many years!

Step 1: Solve warm start issue.
 

I've had warm start challenges for a while now but a couple weeks ago, it stranded me.

Scenario: 1 hour drive down the highway on a hot summer day. After sitting for about an hour, it would not start. The engine turned over but would not fire. I noticed I did not hear the fuel pump turn on with the key in "run", as I usually do. And I could not tell if it turned on in "start". I opened the air box and lifted the air meter to see if the pump ran but could not hear anything. I tried starting it several more times, with no luck. I towed it home and put it on the lift, figuring I had lost the fuel pump or relay (I did not have a jumper or spare relay with me).

Testing: I applied power directly to the FP and it ran. Lifting the air meter also caused it to run. So, I tried starting it. It started.

Today, I measured the fuel pressures.

Temp at the Warm Up Regulator was 21.8C/71F
System Pressure - 4.8 bar/70 psi
Cold Control Pressure - 1.35 bar/20 psi
Warm Control Pressure - 2.9 bar/42 psi (after 5 minutes)
Residual Pressure - Dropped to 0 after 13 seconds

No fuel leaking anywhere. So I am losing pressure at either the check valve (built in to the fuel pump) or the Accumulator.

My accumulator is the type with 3 hoses. If I remember correctly, the hose at the bottom should only see fuel if there is an internal failure of the accumulator. When I pulled the bottom hose off the accumulator, a good bit of fuel came out.

Diagnosis: Failed Accumulator. The only thing it doesn't explain is why lifting the fuel meter when I was stranded did not trigger the pump. (Or maybe it did, but I couldn't hear over the ambient noise and did not run it long enough to get the fuel pressure up.)

Any other opinions or thoughts?

"My accumulator is the type with 3 hoses. If I remember correctly, the hose at the bottom should only see fuel if there is an internal failure of the accumulator. When I pulled the bottom hose off the accumulator, a good bit of fuel came out."

This was proven to be incorrect, fuel can and will be present in the bottom fuel line on the accumulator with a properly functioning accumulator. How much flows out may be debatable. The way to test is to apply a vacuum and see if it holds, I removed mine for this test. Tony has shown several methods to test.

Phil

ahh911 is correct. A more accurate way would be to take the line off the bottom of the accumulator and plug it. Here is a good thread dealing with possible issues and testing.
http://forums.pelicanparts.com/porsche-911-technical-forum/1159640-fuel-pressure-testing-system-pressure-cold-control-pressure-residual-press-0-a-3.html

As for the fuel pump, could the fuel pump relay be failing?

Did a vacuum test on the fuel accumulator. It had a leak. Replaced it and now the system holds pressure as expected. I also replaced the fuel pump relay, just in case.

Now I have to go solve a shifting issue in the 944 race car.

Re fuel in the bottom of the accumulator, to be clear:
There will be some fuel there because that is the return line, and some fuel will migrate there from the return loop. However, if you remove the line, and then RUN THE PUMP, you should get NO fuel leaking out (be sure to plug the return line when running the pump). If fuel leaks out, the FA is bad and must be replaced. After you remove it from the car, try the vacuum test too.