Question about 2005 Jeep Wrangler

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2005 Jeep wrangler w/rough idle and hesitates when you accelerate

When idling my jeep runs a little rough, it also has a slight hesitation when you go to accelerate from an idle. It has a clean air-fiter, new spark plugs, and only has 39,000 miles. What could it be? Throttle body? Vacuum lines?

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  • Hookm Apr 21, 2009

    I have a 2005 Jeep wrangler.When I start it , it idles fine .When i put in drive it begins to hesitate and will some times die . The jeep has 22,000

    miles on it .I don't know where to start first. I have owned it for about 3 months .I have run one bottle of fuel injector cleaner through it , it seems to have got a little better , but , still is doing the same thing.

  • Anonymous Mar 14, 2014

    rough idle, particularly after running and warm. Periodically hesitates at take off and hesitates between 30-50 MPH.

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WHat does the filter look like? can it breath? what does the throttle body look like? is it carboned up? lastly, fuel pressure. remember, you only need fuel, spark and compression to run a motor. But the air with clean air filter, the non carboned up throttle body would let the computer know you are clean and not run you rich which will happen soon, and pressure. But seriously, this should be under warranty?

Posted on Oct 19, 2012

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Try fuel injectors....run a bottle or two with full tank through it and see if that dont solve the problemo.....

Posted on Feb 01, 2009

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Cheers.

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try cleaning the inside of the MAF sensor and do the following procedure as well.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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