A misfiring engine should always cause some concern. In order for your vehicle to deliver the optimum performance and efficiency, the engine must remain in tip-top condition. Here are five of the most common causes of a rough idle. Cracked Vacuum Hose Most modern engines are designed with a series of vacuum hoses. If one of these vacuum hoses happens to crack or become disconnected, this will ruin your vehicle’s gas mileage. Your engine will not be able to maintain the proper air-fuel ratio. While tracking down a leaky vacuum hose can be difficult, an experienced mechanic from a San Juan Capistrano auto repair shop can quickly pinpoint the source of your trouble. Clogged Fuel Filter Often times, many car owners fail to replace their fuel filter on a regular basis. Although today’s fuels are relatively clean, they can still contain a fair amount of contaminants.
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