sounds to me like something that throttle body could sit on.
with fuel itchyou's I have found basics help first.
Push loose connectors back in around ecu and engine bay . have a good look at them for any signs of problems. Even worth checking speedo conectors I believe sensor/wires be there.
MAF dry solder joints. Pre face non coil pack models
clean air filter.all filters?
clean maf air sensor in trotle body
no air leaks after air sensor.throttler body to plate? all the way through.
no binding wheels
oxygen sensor?
overly big air box or exhaust?
coolant temp sensor?
and aero dynamics
