newb need help. I have a 92 civic hb dx 1.5 nonvtec with d15b7 engine. when I start the car, engine it will rev high and when it warms up. it will idle up and down( like a racing car). checked ecu it popped 1 and 43. replaced O2 sensor and fuel filter. still the same, surging idle. I tried running the engine and pulled out the map sensor and the car idles fine. Is it the map sensor or something else? and likewise I reset the ecu and still have the engine light on and popping code 1. please help