2005 Kia Optima no power

2005 KIA OPTIMA
149,000 MILES
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MMT_1990
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OK, first let's start off by saying when i bought the car 2 years ago the check engine light was on and the RPM gauge didnt work. Now, about 3 weeks ago i was driving at about 60 MPH and all of a sudden boom loss of power dropped down to about 40 no matter how many times i mashed the gas it wouldnt accelerate then all of a sudden it picked up speed out of no where.When sitting in park irs very sluggish and the engine jumps back and forth bad real bad. Ive replaced coil packs spark plugs iac valve ive cleaned throttle body ive checked mass air flow and cam sensor the only thing i havent checked is crank sensor and oxygen sensor only because i dont know where they are. If you can help me in any way itll be appreciated.
Oct 17, 2013 at 10:45 AM
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JACOBANDNICKOLAS
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Have you had the computer scanned for codes so we know where the problem is coming from?
Oct 17, 2013 at 10:59 AM
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MMT_1990
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No I'm afraid it won't make it to local parts store
Oct 17, 2013 at 11:02 AM
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JACOBANDNICKOLAS
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You need to borrow or rent a scanner from a parts store to check for codes. Chances are it will identify where the problem is coming from.
Oct 17, 2013 at 11:04 AM