just got done with the d15b swap in my 98 civic dx coupe. i start it up and rev it up, but some how it won't rev pass 4000 rpm!! what is going on here. everything seem to be running right. take it out for a drive and it dose the same thing, can't go pass 4000 rpm! anyone know what the problem might be, has it happened to someone before, how did you guys fix the problem? thanks in advance.