I have a 91 Integra i put a b16a in it, now when its cold it runs great when its warm it revs fine but it feels like im towing a heavy load. and vtec just dies. I have checked my timing my temp sensor, distributor, i have no codes, and its not my clutch slipping, because when it happens it just revs slow it doesnt rev and not move. has anyone else had this problem? Any suggestions? please i cant get anything. i have a friend that works a a local honda dealer as a tech and hes not sure what it is either. Please help thanks.