Question about 1999 Kia Sephia

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Car stops running

When I stop at a stop sign the car will not idle, sometimes it misses when I let off the gas but not really bad yet. The main thing is that everytime I stop it quits running it has been starting back every time but I don't know how long the starter can take the punisment. The car has a total of 168,000. miles but is still in fair condition and hasn't posed too much of a problem until now.

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Most often times when you have poor idle conditions it is due to a faulty throttle position sensor(TPS) however if you have not had as tune up in a while a good start would be to replace the fuel filter first. over time they become clogged and will cause the vehicle to stall. Once the filter is replaced and the symptoms still occur then replace the TPS and this should solve the idle problem. please rate.

Posted on Dec 04, 2008

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Car engine idles really high then really low, why?


It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

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1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

---------

Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------------

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http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

-----------


Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------

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http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

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---------

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http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

-------

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-------

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These details will help.

Thanks.

Feb 15, 2013 | 2003 Pontiac Grand Am

2 Answers

1994 Oldsmobile Bravada dies at stoplights, just changed fuel pump/filter and egr valve.Appriciate any help. thanks


check for vacuum leaks. You can do this with a can of carb spray but please be careful as it is flammable! if the ignition wires are leaking and you hit them with carb spray you will start the engine on fire!

The safer alternative is to have the engine "smoked" for vacuum leaks. This is done with a smoker. Any place that is leaking you will see smoke.

A trained ear will also be able to hear a leak.

If no leaks are found try unplugging the MAF sensor. Is is in the air tube next to the air filter box. If performance improves try cleaning it with some MAF sensor cleaner. If that doesn't work than you may need to replace it.

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1 Answer

Car would start idle really bad. Take off really bad spitting and sputtering then smooth out and be ok to drive. @ stop and start again did fine. It was hit and miss. Changed plugs and wires, still runs...


Fuel pump may not supply enough pressure to run engine, but it could be a pluged fuel filter as well. you should get the code pulled out of the computer this will tell you exactly what is wrong or at least narrow down what is causing the problem. It could also be either bad gas with water in it or bad timing or wrong firing order.

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1 Answer

Rough idle, sputtering like its outta gas but it aint.


Could be a vacuum leak as it falls off under acceleration and does not play a part then. Check for broken or cracked hoses.....

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1 Answer

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1 Answer

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1 Answer

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Was this fixed yet? I can't imagine four months of this. Check with some folks in your area that might be able to personally look at your car, ask here: http://www.lincolnsonline.com/forum/forumdisplay.php?f=261

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