Rough idle, bad throttle response - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 09-09-2013
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Rough idle, bad throttle response

2005 4.0, approx 80,000 miles. Recently, the engine is having a slow throttle response while accelerating from a stop and performing very sluggish. I'm also having a rough idle at rest after driving. Could these issues be fixed with a simple tune-up or some other cleaning maintenance that's not listed in the maintenance manual?
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Old 09-12-2013
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Might as well start by giving it a good tune up
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Old 10-03-2013
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your throttle body requires a good cleaning , including the idle air port bore

also time for some new spark plugs
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