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Knocking after changing diesel retutprn pipe

Markie mark

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Just had the diesel return pipe changed on my s max and now the engine has got a knock,  it has no loss of power .

cheers all. 

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  • 2 weeks later...
7 hours ago, dajuik said:

Air in fuel line, choked fuel filter, weak fuel sender unit, choked air filter, spark plug/injector problem/IMV failure, adulterated fuel etc. etc. are some of the causes of engine knocking, missing, rough idling, pickup hesitation..

That's quite a list of things for the OP to check. Would you recommend a set of new spark plugs before doing anything else ?

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