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slow coming down from high rev.

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Old 02-21-2014, 01:53 AM
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Default slow coming down from high rev.
I have a 99 f150 5.4L. I have been racking my brain on this one. I would like some input. The engine is slow to come down from high revs. Throttle cable is not hanging and the butterfly snaps back quickly. I think it might be the throttle body position senser. Does anyone have any experience with this?
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Old 02-21-2014, 02:04 AM
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Vac leak?
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Old 02-21-2014, 04:03 AM
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Nope. Checked that and idle is Smooth and at proper rpm
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Old 02-21-2014, 09:40 AM
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Try cleaning your MAF sensor.
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