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		Peter, check the little opening to the meter, could be somethings lodged in there?, also could be that the meter itself is faulty!....not sure whether it just screws out, maybe Dave can help on that one, you must be getting the jack of this???:D:D:D....hope it's all good soon........
	 
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		thanks Dougal and Gerry.
 
the hose is definitely ok.  Its a wire rimmed type.  
 
I did take the meter off and gave it a blow out.  
 
Its not worrying me too much. I am currently running on a single filter but only doing city driving.