Hey guys I really appreciate the help, that's one reason I joined this forum also to to add any experience that I can offer to assist other members, its how we keep our vehicles on the road without going to big brother all the time emptying our wallets.
The Maverick has gone back to the LPG workshop for a tune and he is going to check a few things, the miss is definitely more apparent on fuel than on Lpg but its there. Reading other threads spiral leads seem to be the go with a cooler plug, the head has had lots of work done to it and mechanically all compressions are spot on. When I checked the vacuum lines I did not detect any leaks and no stray arcing was seen or heard at night, the vacuum operated fuel regulator shows no signs of seepage either. It does take 3 turns of the key to fire up, system always selects fuel to starts on.