I was experiencing symptoms such as jerky engine performance and pretty much no power till 3000rpm. On a hunch I tried an ECU reset by disconnecting battery even though I have always denied it as a placebo. The car felt much changed afterwards. It is still not 100% but the jerks are gone and power is coming on by 2000rpm. Maybe the ECU just needed to start afresh ?:confused So, give it a try. Nothing to lose. Cheers. I kept the battery disconnected for around 20 minutes. During that time the ignition switch was turned to "MAR" to remove any residual current whatsoever.