I have installed an lpg system in my 1998 (manual) pathfinder. I am happy with the results, since I am saving both money and the environment. However, I heard somewhere that modern fuel injected cars, when going downhill, simply stop injecting fuel into the engine when no power is required. Since the lpg system is carburated, not injected, the car would burn fuel whenever the engine sucks air.
Therefore, would it save fuel to switch to gasoline when driving downhill? This switch is easy to do, during the installation a switch was added in the dashboard, don't even have to stop the engine.
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