Just fitted a dumpvalve 2 my s2erst ive got a samco hose with the dumpvalve takeoff and not the alloy tpiece lumbed it all in with a bailey piston dumpvalve splicedinto the vacumm hose on the right hand side and it wont idle at all it starts then cuts out, now i was lea to believe the idle would be crap, bu it doesnt idle whatsoever , now most of u will say take it off bt thats not the answer im after, any ideas whats causing this is it a faulty dumpvalveor something else.ideas please .p.s ive taken it of for now and plugged the hole and its fine........but i want to put one back on