Mine did the same...put it in the local garage and they spent 2 hours scatching their heads.
IT TURNS OUT there is a tendency to put the fuel filter in wrong which results in air being drawn in.
The rubber ring gasket has to go in BEFORE the filter, not afterwards.
Durts
September 2008
I had the same problem as above and putting the rubber seal in before the filter has cured the problem. So simple!!! Great advice!!!
WhiteVanRyan
November 2009