As Spinksy has said. Yeah, I had this problem with the EL system. I think it has something to do with the 'balance line' (the piping that runs to your airbox from the factory mixer / converter. Once again, another $hitty thing about LPG to add to the list :-(. Not to hijack the thread, but outta curiosity, anyone wanna buy my GRA setup ?
Wagons are rarer ;-)