http://www.youtube.com/watch?v=RyNNBeyj05k Heres a better video please tell me wats wrong thanks b4 spending big bucks Some original photos have not been recovered yet.

vacuum leak

If it's fine on petrol then it can NOT be anything shared. i.e ignition,most sensors, and the pre mentioned vacuum leak could only be LPG specific. The disconnected part you hold up looks like a LPG primer?

Quote: Originally Posted by sigmund [View Post] If it's fine on petrol then it can NOT be anything shared. i.e ignition,most sensors, and the pre mentioned vacuum leak could only be LPG specific. The disconnected part you hold up looks like a LPG primer? Thats actually wrong man, I have a falcon and while running on petrol it was fine - didn't miss a beat. But on gas it wouldn't rev cleanly, odd backfire, chugging from 2000rpm - however it would rev cleanly at higher rpm. I replaced the plugs with NGK gas plugs, new good quality leads, and new coil packs and didn't touch the gas tune at all - and it now drives like its on petrol. Gas requires a lot better/stronger ignition and puts more load on it - than petrol does - for petrol how it was, wasn't a problem.