I've searched the threads but I've identified the issue with my boat to a bad fuel pressure regulator. The part number on mine says it's a Denso 23280-50060. Apparently not the same as the LS400 fuel pressure regulators because the cars have a vacuum line running from the intake/throttle body to the regulator (Denso 23280-50050 I believe). Anyone know if I can use the LS400 regulator and cap off the vacuum tube? Or better yet, where to fine a proper replacement? I'm going on vacation on 8/3 (four days from posting this) and I'd really like to have this fixed prior to leaving.
FYI the original issue is that the boat starts up, and drives great until I go back into idle and it dies. Very hard to start after that. Clamping the return hose to the tank fixes this. High pressure fuel pump was replaced in the last few day before realizing clamping the return hose would fix the issue. It also didn't sound very good.
