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A 1999 will be computer controlled and you cannot adjust the idle like you would with a carb. If it is idling rough there is probably a larger problem in play. Most auto parts stores will read the trouble codes from the computer for you and help you track down the problem.

there is a sensor on it called the E G R valve replace it that's on a 1999 5.4 engine

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โˆ™ 2011-09-12 23:06:17
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Q: How do you adjust the idle on a 1999 Ford F150?
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