Ford transit 2.2 350 high roof only passed cvrt

engine has slight knocking sound only passed cvrt before Xmas then on the way home from the test centre engine started to knock it sounds like injector knock but I’m not to sure starts and drives but down on power so probably best to tow it away mileage is 360.000km for sale for parts or repairs price is €2800 or nearest offer sold as seen Got a good bit of work done to pass cvrt New copper brake lines front and rear 2 new rear shocks 1 rear leaf spring 2 rear bumpstops 4 good tyres Rear pads and disks & 1 new brake calliper 2 front track rod ends & tracking was done