it has a mixer on the intake pipe.
this was checked by an lpg mechanic as well.
The car is definitely idling roughly and extremely rough on acceleration.
I will find how to chack the sensor first as it will be easier and if OK go the balancer route. Went to start it today and it has a flat battery so have put it on charge and with the weather we are having in Sydney I won't be able to test it until it clears up (the P6 LTD takes up both garages
