most LPG systems don't need this as the computer takes care of it, with some old school systems this might be the case but modern LPG uses the stepper motor to control idle mixture. The majority of backfire issues are caused by spark problems,
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Originally Posted by Veefore
If it is backfiring it is probably because it is running lean. I have to adjust the idle mixture on mine twice a year. Once in spring, once in autumn as the ambient temperature changes. If I forget to do it in spring, I get backfiring when I press the throttle open quickly due to the inlet charge suddenly leaning out.
I also notice that I get 310km from a tank full of LPG in summer and 360km from a tank full in winter.
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