My Car hesitates when I go over 30 and really stalls going up any hill. could that be the throttle body sensor?
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2004 Kia Optima Question: What causes my car to lose power pushing the gas pedal?
Answer #1Tomiko February 08, 2013, 20:13Journeyman
i doubt it is the throttle body sensor
Answer #2goodguy February 09, 2013, 03:54Master
replace fuel filter and check fuel pressure to start with
Answer #3wucherer July 24, 2013, 15:11Rookie
Check the massive air inject module. My vehicle hesitated going over 30 and really struggled going up any steep hill and found out at the KIA dealership my air mass injector needed replacing. I have owned this car since purchasing it new and it only had about 1600 miles, gave it 2 issues...engine and transmission. But my vehicle has never given me any issue at all. I love my vehicle.