It's been a few months since my last post and this one is just to report that the problem still exists.
To recap the fault code that is being chased down is P3263 which indicates a faulty MAF. But this has been replaced, as has the EGR valve. These replacements did improve the general running but the same fault of erratic, jerky acceleration remains. In fact the performance is once again getting worse. It's time for a fresh look which will be happening soon.
If only I could relate the performance I experience through driving to the operation of the EGR and turbo boost! Perhaps I will be able to be soon through a data logger I'm making in a separate project.
