Vehicle in for replacement timing chain. After replacement, fault code stored P1385 super knock fault. Contacted dealer who advised they had possibly damaged the rocker cover crankcase ventilation system. New rocker cover fitted but fault not cured. Contacted dealer again advising they had possibly damaged the crankshaft pulley, new crankshaft pulley fitted but fault still not cured. Advised by another dealer the fault was due to sticking valves.
The fault was cured by cleaning the intake system with Forté Valve Cleaner as per instructions. Forté Clean and Protect was carried out and Forté Advanced Formula Gas Treatment and Forté Petrol Specialist Injector Cleaner was added to the fuel tank.
After treatment the vehicle was taken on an extended road test, and the vehicle performance was restored.
Thanks to Simon at Tatsfield Garage Ltd in Tatsfield, Surrey.
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