i just installed a b16a1 engine in my 91 hatch si, my problem is my engine is boging out almost like i'm out of gas or something. when i first start the car and it's cold it's fine but when it gets warm it starts to hesitate in low rpm and high rpm it seems ok around 4-5 rpm. i disconnected the o2 sensers and it seems alittle better. i did replace the injecter resester box with the b16a one could that be it? also when i wired the ecu i had to replace an altenater wire from the harness the si ecu used 2 wires and the b16a uses 1 wire for the altonator. and also i hooked the two small vacuum lines that go to the intake tube to the big hose that goes to the vaulve cover to the intake. and the ecu is not throwing any codes. also my v-tec sub-harness has a ground wire where is the best place to ground it at? i'm out of ideas any help would be great.