i have a d16z6 sohc vtec. recently the car has been acting weird the mph gauge wont work and niether does vtec.vtec dont engage unless over 20 mph.so i replaced the speed sensor the speed sensor spins but still nom mph reading or vtec.but every no and then the mph gauge will spurt 120mph 25mph it'll go crazy.and the vtec will work but then i just goes back to zero while iam still going 60..so it must be the computer or maybe i have the wrong computer. the computer says p2p..........help.need info