Range rover lpg problem

HELP ME . Range rover 2005 4.4 V8 m62 engine autobiography. Bishop Auckland ......Co durham. While i was replacing rocker cover gasket i had to remove water elbows on bottom of prins multipoint reducer . as soon as i started to undo clip the elbow just fell apart . i ordered a refurb kit and replaced elbows the re fitted to car. I know have the problem car runs on fuel but as soon as it switches on to gas i get a loud constant beeping noise just like when you boot it and it switches back to fuel. Does the prins multipoint need bleeding or to be recalibrated after reducer removal is there something i could have done wrong?
Thanks
Paul

Yes i would say you have air locked it just dissconnect the hoses one at a time and fill with coolant then connect one up to the vapouriser and again pour coolant down the water hose until cooland comes out the vapouriser and recconect.....hope that makes sense

biketeacherdave said:

Yes i would say you have air locked it just dissconnect the hoses one at a time and fill with coolant then connect one up to the vapouriser and again pour coolant down the water hose until cooland comes out the vapouriser and recconect.....hope that makes sense

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Thanks so much I'll give it a try.