I have a feeling it does run a MAF sensor. In the last 1000 k's I have replaced the intake plumbing as I blew a hole in the last one under a backfire situation (Ran the lpg too low). Has run perfect since replacing the plumbing so I wouldn't have thought the MAF would be the issue but it did cross my mind. What would you suggest Westy's?....MAF cleaner? I have recently done a little bit of offroad wheeling so maybe dust could have covered the sensor?