Hi

Car came in for no power and misfire. Customer already replace coil and air mass. Scanned with solus. multiple misfires and misfire numbers 1 & 4 cylinders. Replaced plugs and checked data all seems with in scope.we swopped injectors 1 & 4 with 2 & 3 and roadtested all drove ok for about 3 miles then fault came back. Scanned again and fault still on cylinders 1 & 4. It seems that we can clear the codes and car drives ok for several miles and then starts missing again. We have tried our own coil and air mass but still the same. wondering if fault is within the engine ecu unit.

Any ideas anyone

Paul