Question about 2002 Kia Sedona

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02 Kia sedona. I changed the catalytic converter, Plugs, and wires, and it is idling very rough. Before I changed all this it burned a quarter tank of gas in about 20 miles so it is not burning the gas. Any idea as to what it could be?

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Well since you changed all of those things there are still come other culprits that can cause rough idling. Another cause of a misfire or rough idling may be a coil that is not functioning properly. Also Sensors that are not reading correclty. The most possilble sensors would be the mass air flow sensor, idler air control, or o2 sensor. They all have control in telling your control module how much air is entering in the engine so that it can determine the appropriate amount of fuel that needs to be used with that air for combustion. If its burning a great amount of fuel then the system is running rich. Have your local parts store check to see if you have a codes.

Hope This Helps!

Posted on May 28, 2011

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