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by nzxtnzxt
12 Sep 2025, 13:29
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

Re: S60R 2004 – falling fuel pressure

According to Vida, I have fuel pump basket 30761744. I can use 30761745, but I have to replace the electrical connector of the overflow pump. I can also buy 30761747 at a good price, but it differs in terms of the valve and I don't know if it is located inside the fuel basket and at what pressure it...
by nzxtnzxt
12 Sep 2025, 13:16
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

Re: S60R 2004 – falling fuel pressure

Does every fuel pump basket have the same valve? I think it's 6 bar when it should open.
by nzxtnzxt
12 Sep 2025, 13:15
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

Re: S60R 2004 – falling fuel pressure

I think that your main issue is backflow of the fuel. If you fix that your car will be starting good without need to prime the system every time. So maybe get yourself a used unit and drive happy? I heard that there are plenty of salvage yards in Europe that will get you a unit if ordered Yes, you'...
by nzxtnzxt
24 Aug 2025, 03:32
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

Re: S60R 2004 – falling fuel pressure

I agree with jimmy57. However, if the money are really tight one can always buy just fuel pump made by Bosch or pierhburg and integrate it into the original sending unit. Another alternative is to source a one way check valve from aliexpress or any other more trusted European websites. Can either i...
by nzxtnzxt
24 Aug 2025, 03:26
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

Re: S60R 2004 – falling fuel pressure

The valve pictured is the max pressure relief. The other item holding pressure is the check vale integrated into fuel pump. When you hook up the fuel line to sender top you have both in the circuit. Did you remove the sender and actually see it dripping? The fuel sender assembly fixes both leak sou...
by nzxtnzxt
23 Aug 2025, 11:43
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

Re: S60R 2004 – falling fuel pressure

The fuel pressure sensor is 100% functional; the problem lies in the valve in the pump – see photo 1.
by nzxtnzxt
23 Aug 2025, 11:33
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

Re: S60R 2004 – falling fuel pressure

The symptoms are that it takes a long time to start, or you have to turn the ignition key several times, or it takes a long time to start,In addition, it does not reach the required pressure set by the controller.
by nzxtnzxt
23 Aug 2025, 10:46
Forum: S60, V70, V70-XC 2001-07
Topic: S60R 2004 – falling fuel pressure
Replies: 13
Views: 570

S60R 2004 – falling fuel pressure

Hello, pressure loss after turning off the engine. I checked that the pressure is escaping through the valve shown in the photo. I disconnected the return hose from the pump, installed a tube and held it with my finger, turned the key in the ignition and observed the pressure parameters in Vida to c...