I'm getting the p1545 code intermittently on my 1999 passat 2.8 liter glx. But it always returns in the end. Replaced al vacuum hoses new fuel filter new vac pump pulled and cleaned the throttle body. The car sat for 3 years (ran good when parked) before I got it. All the fluids and filters replaced. It runs and holds idle . I can rev it up in parked but it's not super responsive. when I put it in gear I can take off but if i try to accelerate it bugs out?? Can this be the fuel pressure regulator?