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When the AC is on most vehicles increase the idle speed. That can often mask the problems that cause rough idle. The primary suspects are: EGR valve, tune-up, sticky or plugged injectors and valves.

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18y ago

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What will cause a 1984 Toyota Tercel to run rough when first started until warmed then will run okay the reset of the day?

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What would cause a 93 Ford Escort LX to idle rough and die when stopped or in park or reverseIs this a serious problem?

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What problem were there when they were invented American football?

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