Lexus is300

So ive gone through everything, on my lexus, started with a
misfire I took is straight home and changed sparkplugs,
knowing it's a small process I was very precautionary but I
didnt do my battery, now i reset ECU and checked all fuses I
did get it to start after about 5 mins of idle I revved just a
bit not over 3k rpm and it bogged down til it shutoff now it
hasent started sinc I did pull the back seat and check my
fule pump looks great, so I plugged it all in and kep the gas
line off took a irrelevant tube to see if gas was being
pumped and nothing came so I tried to reset it by turning
key to ecc for a few moments then off and I've been
fighting with it for about 2 months now, any tricks, please I
really hate seeing my car down it's my pride and joy i never
had any issues with it prior its immaculate i keep up on
everything this just has me stumped