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Check the cables on the battery/fuse box to make sure they are not loose. Also check your Alternator. Your car runs off the alternator when its running, only uses Battery when it's off. Accessories also run off the battery when you're driving (dvd/cd players, speakers, amps) all of this drains the battery and the alternator recharges it. I'd check for a loose connection first, and then test the Battery and Alt. If you have a sound system, check that too. Also try removing and cleaning the Air Inlet Control Valve. Also check the spark plugs because they provide the energy for the engine.
Please get back to us if you have further query else please accept the suggestion.
Have an OBII scan done. (fault scan) Any good parts store (Autozone, Advance, etc...) can do it & FREE. This will identify what exactly is needed to be replaced, instead of throwing parts at it. When was last time fuel filter was replaced and injectors cleaned? I'd start there...
Click
the link below to troubleshoot this problem: ---
Car loses power while
acceleration?
http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html
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Loss of acceleration?
http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html
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Acceleration lag problem?
http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html
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How exactly the Vehicles
Accelerator Cable works?
http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html
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How exactly Vehicles
Accelerator Pump Diaphragm Works?
http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html
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accelerator pedal sensor?
http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html
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stalls and bucks on Acceleration?
http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html
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Engine accelerates when brake is applied?
http://technoanswers.blogspot.in/2012/02/engine-accelerates-when-brake-is.html
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This
will help.
Thanks.
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Faulty crankcase censor that sends the dignal to the throttle censor. Problem fixed.
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