hello i have sold my old s2 rst and now just bought a s1 rst but i have a problem sometimes it will start but it will only run for 5sec then it will just die on me even if i hold it on the revs i hav looked at all hoses changed spark plugs leads dizzy. there is a good spark. on the metering unit if i take any of the red hoses off and turn it over is the ment to be petrol coming through coz theres not also when i undo the feed in pipe it piss's out of there is that right can any one help please

 

check your fuel relay
sounds like its primeing engine ok
had this problem before