Fitted new fuel filter, new pressure regulator, new coils, spark plugs, cleaned fuel injectors (works perfectly)... With fuel pressure gauge I found only 1bar of pressure on main fuel line. After investigate a lot, I found this return valve leaking a lot inside of the tank. After refit one side with other, its improved and comes at 4bar.
On first acceleration this valve released again. My workaround was fix with plastic tireup, but still leaking a little under pressure.
I have searched a lot about this valve, but I can't find how it can be replaced or were to buy a new one. Etka doesn't contains this part..
I think this return valve that can be:
Anyone has suggestions on how can I get this part or pn for RS4 B5? thanks in advance!