david.jones770 Posted March 8, 2018 Share Posted March 8, 2018 My 300tdi suddenly developed a problem misfire. It's down on power and is smoking. The engine starts on the button whether warm or cold and runs smoothly at idle. Increase the revs and there is this lumpiness/misfire and clouds of exhaust smoke. The EGR valve has been blanked off before I got the vehicle. Any advice would be appreciated. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 8, 2018 Share Posted March 8, 2018 What colour is the exhaust smoke? Quote Link to comment Share on other sites More sharing options...
SPendrey Posted March 8, 2018 Share Posted March 8, 2018 If it's black, it could be an airflow restriction causing an issue, perhaps delaminated turbo pipes? Or maybe simply a badly soiled air filter? Quote Link to comment Share on other sites More sharing options...
Blanco Posted March 8, 2018 Share Posted March 8, 2018 Had the same thing a while back, turned out to be a loose tappet had thrown a little round disc out.... Easy to check. Quote Link to comment Share on other sites More sharing options...
david.jones770 Posted March 10, 2018 Author Share Posted March 10, 2018 The smoke is black/dark. How would I check the tappet? Thanks. Quote Link to comment Share on other sites More sharing options...
Sabre Posted March 17, 2018 Share Posted March 17, 2018 The little round disc is probably a valve cap Picture taken from Les Henson's thread on the removal of a 200TDi cylinder head Quote Link to comment Share on other sites More sharing options...
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