Evening Jonathan,

At the moment we don't know if the misfire is ignition, fuelling, or engine related. I have a "thingy" which I plug into the plug lead which can determine whether an ignition misfire is caused by either the coil or lead. If ignition related, is it possible to scope the signal from the ECU to the coil-pack? What plugs are you using? I assume vehicle has correct 5w-30 oil. Compressions? Emission figures may be of help also.

I do not remember seeing ECU problems on these except the earlier models where an ignition misfire has spiked the ECU.

I can remember one case a year or so back when I diagnosed a faulty coil pack. Customer fitted a new one but fault soon returned. Customer had overtightened the new coil pack to its metal base which caused a hair-line crack. Found that by accident because I removed the coil from its fixing plate and misfire stopped. Coil HT was earthing to the metal plate.

Rgds

Pete M