Quote Originally Posted by Bigrig View Post
I normally start on petrol when it's cold as my LPG system doesn't do the whole squirt of petrol thing, and I don't risk it backfiring. On the odd occasion I have forgotten to change back and have started on gas, it hums, but not on petrol .. I let it warm up and then switch to gas.
Thinking I'll go to Repco tomorrow morning and get one just to suss it out - would love it to be the coolant temp sensor, but still makes me wonder why two would go in the space of four months. I'll get some CRC MAF cleaner first though and give it a blast, just in case.