Need help I inherited this boat It's a 89 sea ray weekender with the 5.7 boat has been sitting for 7 years when I got the boat drained all the fuel out prime the oil pump squirt oil in the cylinders change plugs rotor cap Wires water pump did a compression test got 140 Psi in all cylinders took it out on the lake ran pretty good but once you try to open up the four barrel it fell right on its face no power if you kept it under 3000 rpms it was running great then all of sudden it backfired and would not run pull the carburetor off and got it rebuilt now when you give it gas I she will run great until 2000 rpms anything over that she doesn't have any power she almost stalls if you hold her wide open and once she gets about 3500 rpm struggling to get there she'll take off like a rocket had the carburetor Quadrajet 4 barrel rebuilt by a professional does it sound like it's still in the carburetor like I said if you hold her wide open as she runs great want you back the throttle off a little bit she says loses all power I also replaced all fuel line check valve in the tank clean the screen new fuel filterS did a fuel pressure check I got 6 pounds of fuel pressure what else can it be I would appreciate all the advice