OK, so i have a 1997 civic that had a d16z6 in it and it blowed up... 2 big ass holes in each side of the block but anyways when that motor was in the car it revved perfect even with the holes in it. so i buy a motor from tiger Japanese a d15b vtec-e put it in and now the car wont rev pass 5300 its not a rev limitor or any thing it like boggs down ive checked all the wiring,ecu,spark,ect... any help would be nice thanks...