I say B16A (P30/P08) chipped.
This way the chip can increase your rev cut which e-manage cannot do.
This include speed cut form standard ecu.
Fueling/timing all can be taken care by emanage.
I don't know what's the real problem here. The RPM is too low, all the lights, radio getting dimmer.. sometimes the radio on and off, the voltage seems to be unstable.
