Thank you, guys. I got a fuel pressure gauge, but didn't pay attention - was in 10 PSI increments !?!? - I just assume that the normal pressure would be under 10 PSI and it is difficult to read when the scale is 0-100 psi. It looks to be moving a bit, but one interesting thing I noticed,- when I press release knob, there is no fuel, but just air being released. Tried it several times,- same results... As if fuel doesn't even get to the engine. One mechanic mentioned to me that you can check pressure somewhere closer to the fuel tank... Is that true? Just to eliminate clogged fuel line. After all fuel pump is $300 and it will take time to get it and install. Wanted to make sure that this is the cause of my issue. Once again - thank you guys for your advise and help!!!

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BMW X5 2001 3.0