Question about 2001 Kia Optima
Seems you have 'MULTIPLE' possible causes for this problem. First of all, I'd have a mechanic (a smart one) check the Throttle Position Sensor (TPS) first, Usually, the TPS does have a direct effect on trans shifting erratically. It's also used by the ECM (Engine Control Module) to calculate 'LOAD' and subsequently the Fuel Mapping (fuel to air ratio, ignition timing, etc) which could possibly create a RANDOM MISFIRE condition. This other description you have regarding 10 minutes - that one's wierd - could be a multitude of possible causes (i.e, fuel pressure not enough or too much, malfunction in the Engine Coolant Temperature (ECT) sensor, malfunction in the Intake Air Temperature (IAT) sensor. First things first - get the TPS checked - if found bad - replace it. Go from there.
Posted on Jun 20, 2009
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Posted on Jan 02, 2017
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