Question about 1999 Kia Sephia
For me, it turned out to be vacuum leak. I searched and searched to no avail, then I found the air leak... It was the seal for the idle air control valve. Turns out, it was cracked in a spot. So, I removed the valve and the seal, used a thin layer of gasket maker, reinstalled, and now it runs perfect. No more codes either!
Posted on Mar 10, 2016
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Posted on Jan 02, 2017
it means your cars computer is pumping too muchgas into your motor because it thinks the engine is either running lean possibly due to faulty o2 sensors or that the coolant temp sensor is giving false readings and the ecm thinks the car is still too cold.
Posted on Mar 02, 2009
Vacuum leak somewhere.
Possibly could be the O2 sensor (the one before the cat up front).
I'd search for a vacuum leak since you may have rattled something loose.
Posted on Jul 15, 2009
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