I'm not sure I posted something similar but I've always wanted to know why the original pumps were failing at a high rate on the T1 and T2. Maybe more on the T1. Mine i a 2004 and the pumps have not been replaced yet. I'm seeing a rich condition and I'm troubleshooting it bit by bit. I will be working on the fuel rail in the next step. The fuel pressure is one of the causes of such conditions. So my question: Anyone know why those pumps were failing at that rate on the Touareg, the Phaeton and the Cayenne and maybe the Q7?
I suspect the fuel lines get old and start leaking back in the tank or a clogged filter or fuel pressure regulator.
It's seems a lot of waste if you just need to replace the fuel submersible in-tank fuel lines and connectors and the fuel filter and be back to business without having to throw those pumps in the bin.
Anyone done a test of the whole system when replacing the pumps?
Looks like everybody is just replacing the two pumps. I'm thinking of getting a used full fuel pump setup from ebay just to study this issue and maybe offer a more affordable reliable solution and stop wasting those pumps
I suspect the fuel lines get old and start leaking back in the tank or a clogged filter or fuel pressure regulator.
It's seems a lot of waste if you just need to replace the fuel submersible in-tank fuel lines and connectors and the fuel filter and be back to business without having to throw those pumps in the bin.
Anyone done a test of the whole system when replacing the pumps?
Looks like everybody is just replacing the two pumps. I'm thinking of getting a used full fuel pump setup from ebay just to study this issue and maybe offer a more affordable reliable solution and stop wasting those pumps