I wonder if I need a new clutch vacuum assist line.
[quote]There is a known problem on early delivery RS4s with the clutch vacuum assist line. This needs to be replaced. Basically the line is too week and colapses, pinching off the vacuum. One way to see if you have the problem safely is to place your transmission in neutral and depress the clutch petal twice rapidly in succession. If you have the problem, on the second press, the clutch petal will stiffen up and be almost impossible to press to the floor. But, any kind of change in clutch operation on the 2nd press is a problem.
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It is back at the shop and we are going to try:
1/ reset hall switch to normal
2/ bleed slave line again
Any of you guys see anything else we should replace? Obviously we have done the master, the slave, the line in stainless steel, the throwout bearing, the pressure plate.
Maybe the actual over center spring on the pedal? I know the spring makes the clutch-in effort easier, but it also serves the function of returning the pedal.
http://www.jimellisaudiparts.com/showAssembly.aspx?ukey_assembly=746646
http://www.jimellisaudiparts.com/images/parts/Audi/fullsize/670721250.jpg