i recently did a 89 dx crx to a 91 si swap(d16a6). the car is running and driving and it was fine but now something is wrong. whenever i get to 3000rpm is starts to bog out and you have to shift or let off the gas because it justs bogs out and back fires. the stock exhaust is done for sure. do you have a check list of things i could do. i think it might be the tps, ive checked all the minor things, any help would be greatly appreciated because the car is sold to someone and he is bugging me everyday to have the car ready for him. again any help would be really really great.