JfA

I have a 100 series Landcruiser with an after market gas conversion. I was running on LPG and switched to petrol as the gas ran out but the car stopped and would not start again. It had been running without any issues on both LPG and petrol prior to this. Towed it to the servo and filled up the LPG and now the car starts on LPG but won't rev above about 2000 RPM. It will not run at all on petrol. Where do I look