ok i didnt use an a6 head i found another y8 head but it is still doin it idk wha the hell it is does anyone think its the dash harness or wiring all together this is everything i have changed.....,fuel pump,injectors,iat sensor,map sensor,throttle body, throttle body gasket, intake manifold gasket, intake manifold, motor harness,dizzys,heads and head gasket. can anyone think of what it could be the only codes it is throwing is v-tec and O2 sensor which neither one of them can be the reason why it is doin this. again what it is doin is u give it full throttle it bogs down if u give it half u can drive it normal