V6- LPG- engine misses under load??

[beerdog Lurker Find all posts View Profile Close beerdog]

I've recently had LPG fitted to my v6 petrol Prado. Under acceleration / load there is a very annoying miss in the engine. This doesn't happen when running on petrol though.
LPG installer is adamant that it is a problem with the ignition. I've replaced the plugs, leads and coils but it's still there.
Anyone have any ideas?
Personally, I think that it is a problem with the LPG system.

[williade Avid PP Poster! Find all posts View Profile Close williade]

I'd be getting a second opinion from another lpg installer. Lpg is more sensitive to the fuel-air ratio, so there could be a leak in the intake manifold that is small enough not to affect petrol operation but throw the lpg mix out.