A 'tractor at idle' rough running on the Toyota 1.4 D-4D is the classic Denso injector failure — the copper sealing washers leak and combustion gas blowback carbons up the injector seat. Caught early it's a £150 fix; ignored it's a £600 head seat repair.
Bob's Mechanical Repairs — independent family-run garage in Birnam, Dunkeld, Perthshire. Call 01350 727 276 or email [email protected].