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Achieving an ideal air-fuel ratio in your engine is very important. If the engine is run with too much air, or lean, internal temperatures will be too high and this can cause serious internal damage. If the engine is run with too much fuel, or rich, residue build up will occur and cause problems as well as reduce the fuel efficiency of your vehicle. See this section for everything you need to ensure your engine gets the correct air-fuel ratio such as air mass sensors and fuel pressure regulators from Bosch.
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