What Causes the Engine to Shake When Running on Gas but Not on Oil?
2 Answers
Check the fuel system. If the air filter hasn't been replaced regularly, directly inspect whether the gas injector is clogged (possibly by engine oil or similar substances). The worst-case scenario would be severe valve wear. Here's some relevant information about vehicles running on gas: 1. Formation: Fossil fuels refer to petroleum or coal formed through billions of years of underground transformation of plants and animals. Natural gas is produced through petroleum cracking, representing a non-renewable energy source. 2. Considerations: The combustion products of natural gas differ from fuel ethanol. Fully combusted ethanol only produces carbon dioxide and water, and methanol is no exception. However, methanol is corrosive to metals, various alloys, and rubber products, which is why only problem-free ethanol is selected as the fuel for unleaded gasoline.
I've been in auto repair for over a decade, and cases where the engine runs smoothly on gasoline but shakes on gas are quite common. The key factors are usually improper gas system calibration – clogged gas injectors or unstable gas pressure can cause uneven fuel delivery. Gas requires more precise ignition energy than gasoline, so worn spark plugs or weak ignition coils often cause shaking. Another issue is oxygen sensors giving inaccurate readings in gas mode, affecting the air-fuel ratio. If the ECU tuning of dual-fuel vehicles isn't optimized for gas, problems arise. Ignoring this may damage engine components. I recommend comprehensive diagnostics including scanning trouble codes, cleaning injectors, testing ignition systems, and installing compatible spark plugs. For prevention, regularly maintain gas equipment and always use high-quality gas sources.
