Quote:
Originally Posted by patrolman pete
Is the undertray secure ? I’ve attended a few jobs where the member has complained about a whooping knocking sound from the front of the car over certain speeds. On arrival I’ve found that the air was getting under the front of the insecure undertray and making it act like a wobble board !
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Also check brake air ducts (item14) as these can come loose:-
https://rimmerbros.com/Item--i-GRID001808
More likely to be air con related though.