Hello folks. So, 1992 sl500. Sat for 3+ years. Old gas out, New in and running. Issue, I can reb it up, sounds a little off but nw I’m driving it a quarter mile test area. When I ask it to get up and go, she just chokes, I can get u speed, but need to throttle up slow, still way short of capabilities. I’m sure a tune up would help, but not sure why the slow go.