Question about 1999 Kia Sephia
I hac=ve a 99 sephia that did this, replaced fuel filter, replaced catalytic converter, replaced O2 sensor. lastly ran premium shell gas two tanks solved.
Posted on Sep 17, 2010
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Posted on Jan 02, 2017
SOURCE: running rough
If your car is running rough and it's fuel injected (which yours is). Follow the air intake (black plastic box - housing the air filter that has tubing that goes to the motor) until it reaches the Throttle body (rounded metal air intake at the end of the plastic tube - has one large flap inside). You will want to remove the hose clamp and thoroughly clean the throttle body and the AIC (air idle control valve - small canister attached to the throttle body). Use off-the-shelf cleaner from any automotive store. This takes about 30mins to 1hr depending on your skill level. This will result in a cleaner smother idle and smoother performance. This is a common issue in today's cars. I have to do this once a yr to keep my modified car running happy.
Take a look at the later parts of this article for pictures to give you an idea:
Posted on Aug 07, 2009
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