I have a 2000 Honda crv, check engine light came on so I took it to autozone , code reader said it was the idle air control valve, I told them the vehicle was not surging but still recommended I replace the part. So I bought an after market valve from eBay. I replaced the valve, then erased the codes and when I went to start vehicle that's when the car started surging up and down. Then I checked everything and when I went to disconnect the MAP SENSOR it stopped surging completely, I connected back the sensor and it started surging again. Do you guys think I need to replace the MAP SENSOR or could it be the after market part?or any other problems. Any dieas