hi the vehicle was stood for 2 months whilst waiting for a clutch master slave fixing now it wont start of the key but will start with easy start it will stay running for 10 mins then cut out,its had new diesal filters on ive cleaned the fuel lines out,when primeing the lift pumpi can hear fuel bubbling back to the tank,and also theres frothing coming from 1 of the injectors anyone have any ideas as to what could be wrong with it...thanks