History: Car was sat up for while untill I bought it, put my h23a vtec in from other car that was driven everyday.

Now I got the car the runing all except for the throttle body having a huge gap on bottom from being wrong one(aka h22 stock tb wont mount to a Euro IM). After about 3 days of driving it down road here and there it started hesitating to crank. Idle had dropped form like 1400 to 600,and seemed to get worse everytime I cranked it. Replaced TB to proper one with new thermo gasket. IM has hondata gasket, and I recently retightened them. Replaced FPR also. I even changed back to a more basic tune. It doesn't run as bad but still the problem is there. Basically all 4 of my cylinders are filling with fuel. My Fuel pressure is about 40 at steady idle and goes up to like 50 when giving gas. New plugs were purchased yesterday thinking maybe my E3 plugs had fouled dueto carbon build up from to much gas and didn't fix it.

My only last guesses are because I only filled it up once its stirred up the gas tank and I am running off some bad gas. Or fuel pump bad maybe?