Won't Get Fueled Again

In my last post, I said I finally figured out what was going on with my fuel system. I'll explain that today, though I won't have pictures of the fix as I'm still waiting for a part. Also, the vacuum system is finally finished, marking one more completed subsystem. Queue the Who: "Yeah!"

Fuel Me Once, Shame On, Shame On Me
So, I tested and re-tested trying to get fuel to travel through the lines up to the injection pump. I determined that if I put a one-way valve into the vent / return line from the filter to the tank, fuel would travel up the feed line. This was true, so I put a valve in, and I was able to get the engine to run once I primed the lines. The problem is, once the engine shuts off, and the operation sits for a while, the Injection Pump loses its prime. Huh? Wha' Happen'd?

Fuel Me Twice, Um... Uh... Won't Get Fueled Again
The fuel slowly trickles back into the tank via the feed line. I hit TDIClub, and found that the stock TDI placement has a one-way valve at the tank to prevent a loss of prime. Dumbly, I took the one-way valve from the return line and put it into the feed line. Well, this didn't work, since the return line was now plling air again. Grr... ordered another one-way valve. It'll arrive i na couple of days, and I'll slap it into place and re-prime the lines.

Fresh Air, Sucka
The last bit I completed was getting the vacuum system all sealed up. I had a posting a while back that traced the vacuum system. At that time, I didn't have the turbo line in, nor the filtered air tap. I completed the turbo line when I got the intake work done a couple of months ago, but it wasn't until this past weekend that I got the filtered air tap done. In the bits and pieces that make up my filter -to- intake, I have an AMSOIL air filter connected to a MAF body. This MAF body is connected to a short flexi-hose which connects to a second MAF body. This second body has the actual sensor in it. This real MAF is connected to a rubber 135* switchback sleeve which connects to the stock intake. The first MAF body has a diamond-shaped blockoff plate on it, and it is into this block-off plate that the vacuum nipple was inserted. The vacuum line fit easily, and is routed behind the filter -to- intake chain I just described. I don't have a good picture of this (it is under the rear cabinet), but it fits well, even with the wiring mess in that corner of the engine compartment.

I'll touch on my efforts with the heat later on. Thanks for following along-