Question about 1999 Kia Sephia

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Rough idle, lack of power - 1999 Kia Sephia

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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

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j_del
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SOURCE: 2001 ford windstar

Go to AutoZone and have them scan the computer for codes (it's free). Post the codes they give you on here, and we can narrow it down for you.

Posted on Sep 01, 2008

  • 260 Answers

SOURCE: rough idling lack of power

Try replacing the fuel filter.
Check for a vaccum leak

Posted on Apr 10, 2009

ghost4548
  • 776 Answers

SOURCE: what does the check engine code p1520 -

P1520 Generator FR Terminal Malfunction Harness and connector
This is the definition of P1520

Posted on Jul 04, 2009

stevenhurc
  • 450 Answers

SOURCE: 2000 Daewoo Lanos intermittently idles rough

check throttle body and pcv hoses and ports for blockage possible carbon build up and sticky iac valve

Posted on Jul 20, 2009

beduncan
  • 73 Answers

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:

http://forums.nicoclub.com/zerothread/319146

Good Luck

Posted on Aug 07, 2009

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Is your "check engine" or "service engine soon" light on? Lacking power is usually an emission system problem, for instance possibly a bad EGR valve or mass air flow senser. O2 sensers are common to fault but normally doesn't cause power loss usually causes alittle rough idle. Could even be a pluged catalic converter to. have the truck plugged into a scanner, that will tell you the trouble codes and fault info.

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