[Horneck]

I have measured fuel pressure of my car today and appreciate feedback from the group to what problems the readings point to.
Year of engine 1987. US model, WUR (hard to read) 0 438140 153. Found 742 stamped on the housing as well as a 40 printed on the side.
Temperature at test 80F, WUR resistance 0.26k Ohms
System pressure with both pumps running :6.5 bars
Cold control pressure: 2.9 bars
Warm control pressure at the same 2.9 bars if I measure the car without the pumps running
Residual pressure without the pumps running after 5 min 2.5 bars, after 15 min 2.0 Bars

If I read the data correct my WUR is not dropping the control pressure when the engine warm. Correct?

Who can rebuild my WUR? or where can I buy a new one?

I found another issue. At idle with the car running (1000 rpm), my pressure gauge jumps between 3-4 bars. When I rev the engine to 2000 it stabilizes at a 3.5 bars and is fully stabile at 3000 rpm at 3.9 bars. What does this indicates?

Thanks for your advice