2003 Kia Optima Support Question
2003 Kia Optima Support Question
Find answers below for this question about 2003 Kia Optima.Question posted by lobiancow on August 7th, 2014
Why Does My 2003 Kia Optima Stumble And Miss
When the vehicle reachs operating temp. it begins to miss and has a loss of power. Drive it a few minutes more and it runs fine. Then the same cycle repeats itself over and over. the check engine light came on and it had codes for random misfires. I changed the plugs using oem plugs, changed the wires and coil boots. cleared the codes now i have po302 and 303. Swaped the coils but have not been able to get any codes. Still misses and rpm jump up and down.
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