BMW ALPINA M52 engine
Engine rough running on cold start for the first few minutes and putting the management light on, fault codes stored for misfire and cylinders 2 & 4 shut down. The fault is caused by the hydraulic valve lifters draining out overnight and the ECU shutting down the misfiring cylinders.
The fault was cured by carrying out an extended Advanced Formula Motor Flush adding Oil Fortifier to the new oil and carrying out a spirited road test.
Thanks to Martin at Car Motion in Romford, Essex.
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