hey i juss recently put a vx on my crx ... its all done n everything but it only revs to 5,000 and it backfires while pressin the gas... and the when u rev it i goes hella hella slow....well if u kno nething wat im talkin bout please do help i blew my last motor n im tryin to put a daily driver together thanks... btw if this true? "u can use a pwo on the vx motor" my friend told me itll work but itll run a lil more rich..