Hi all, I've found bugger all info on these things - so I'll ask here: 1) Where can I get a replacement Petrol / LPG switch that goes under the headlight switch on my VR? I've found tons of aftermarket - but not sure on if these will be compatible with the factory impco system. I've managed to find that one of the wires goes to the LPG solonoid, another to pin 20 on the computer - but can't find any other info on how the system is supposed to work. 2) There is an LPG 'computer' behind the glovebox that is supposed to do something when running on LPG. When I first got the car, there were two LEDs on this box - red and green - and they would flash while the LPG system was on. From what I understand, this controls something with the LPG system and allows the car to switch correctly between petrol / LPG (ie overlaps the fuels). I haven't been able to switch between fuels without stalling at idle for years. I'm trying to find the function of this box and info about it so diagnose what is going on. 3) There are 2 solenoids that are routed to the front near the air filter box that used to tap while on LPG (kinda like the injectors do for petrol) - however these no longer 'tap'. Does anyone know the function of these and what they are supposed to do? I can't find any info of this at all. The car still runs quite well on both petrol and gas - but the changeover is horrible - even if done at non-idle RPMs. Thoughts? Ideas? Links? Diagrams?