ok i have a 91 civic with the D15B2. I have installed a D16z6 cylinder head, p28 computer and have it all wired in. The car starts and runs but when i stomp on the gas it acts like its flooding and wont rev no higher then 3500 rpm. I was figurin its just a sensor problem but i have triple checked my wiring and isee no flaws. can anyone give me some possible causes.

 

Possible timing problem, either timing belt issue, distributor, or MAP. Also check firing order.

 

on the mpfi swap the cyp cylinder if it wasnt plugged in it would make your car do the same symptoms as yours