I have a 2001 Nissan Micra K11 1.0. I've been experiencing really poor engine performance recently. It would start easy enough and idle OK, either cold or hot, but would not rev when I pressed the throttle, and was virtually impossible to drive as there was just no power. I tried replacing the fuel pump, but that made no difference. I then tried disconnecting the Mass Airflow Meter, and the engine sprang to life and the car drove fine. I took out the MAF, and found that if I reconnected it when it was away from the air flow through the throttle body, the engine response was fine, but I got the old symptoms of no power or revs as soon as I fed it back into the throttle body. A good clean with electrical contact cleaner on the exposed parts of the MAF has made a big difference, but it's still not quite right. Can you please suggest anything else I might need to do? Am I right in thinking the problem is with the MAF only, or is the also a problem with the ECU?