I have a Fiat Punto Mia 2001. The engine management light came on but nothing seemed to be wrong with the car, then it went off after a few hours. Then whilst driving the car seemed to lose all power, throttle was to the floor and revs were only goin as high as 2000 and I could barely get to 30mph. I checked the spark plugs, replaced them all. Replaced the coil packs and also the head gasket and replaced the ecu as it was found to have had a problem. Now the car will start normally then after a few seconds it will drop to running on 2 cylinders, then it will jump back up to 4 and then back down and keeps doing this. Our mechanic has checked over everything and he is completely baffled by this. Any help would be deeply appreciated. Cheers, Kris