honda305

ok so today while driving i punched it in first shifted to second and the car bogged out and my speedometer stopped working i let off the gas pressed it again but it wouldn't let me pass 4500rpm(my launch control) so i thought my speed sensor got messed up. I kept driving and the cel light came on, I turned off the car and turned it back on but the cel turned off. Then i kept driving and the cel came back on i floored it and it passed 4500rpm but vtec wouldnt engage. WDF is going on?

in a b16a2