Question about 2002 Kia Optima

1 Answer

Cold idle problem

Cold idle is very rough, burns very rich. Smooths out when reaches running temp, but could be better. No codes being thrown. New rotor, cap, plugs, wires, fuel injectors. Where do I start? Vacuum leak? ignition module? It's the COLD idle problem that is throwing me.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Kia Master
  • 5,678 Answers

Air filter,fuel filter,dirty throttle body.

Posted on May 10, 2013

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
vortash
  • 431 Answers

SOURCE: runs & idles rough has no power when cold gets better when warm

Spluttering and missing is usually one of two things Fuel or spark ?
Fuel problems will be traced to 1/ in line fuel filters .. 2/ tank run low on petrol throwing dirt and grit into tank filter ( if Fitted ) and blocked or restricted injectors a good fuel additve sometimes cures that problem , but replacement is a far better option .
Poor spark plugs breaking down under preassure oiled plugs due to overfilling or incorrect fuel mixtures .. poor or cracked distributor caps dirty or damaged rotor arms in said cap .. leaking HT leads damaged by rubbing and contact with hot engine causing sparks to fly to nearest earth disrupting the spark and ignition timing ... hope this helps Regards vortash

Posted on May 13, 2009

  • 85 Answers

SOURCE: 2002 kia sedona 3.5l has rough idle replaced plugs wires and coil

this vehicle has coil packs for the ignition correct? have you ran the engine at night with all surrounding lights outs so its really dark. spray a mist of water on the coil packs and spark plug wires to see if you have spark/voltage leaks jumping out from them. sometimes the tiny sparks will be so fine and skinny you can barely see them so it needs to be dark. hope this helps your trouble shooting. a coil pack could have such a fine crack for the voltage to leak from that you cant see it.

Posted on Jun 13, 2009

  • 1 Answer

SOURCE: 2000 kia sportage trouble code po171 once in

I have 2005 Kia Sportage with a check engine light. No other symptoms. I was told by Kia and Local mechanic that it is the fuel injectors. Error Code states that Fuel injectors are running lean. Put Master airflow- no change. Ran engine test with propane to run rich and trim never changed from 15. Car runs great. Kia dealer said that this is because we use Ethel in gas that it effects the alumium fuel rail delivery to the injectors and that it is necessary to change all of them .Kia Dealer wants $1,000.00 deposit to place order 6 fuel injectors from Kia. (Has anyone heard of that?)Also put fuel injector cleaner in tank.Does anyone have any suggestions before I spend over $1,000.00 to replace all 6 injectors or possible idea of what could be wrong?

Posted on Jan 07, 2010

  • 1114 Answers

SOURCE: engine code p0170 changed air filter fuel filter

hello this is a fuel trim malfunction bank sensor 1 meaning O2 sensor is malfunctioning .Oxygen sensor

Posted on Jan 09, 2011

  • 10 Answers

SOURCE: I need to talk to someone about a 2003 kia spectra LS.I'am trying to see why it's shakes

when you took off the injectors one by one you should have been able to determine which cylinder has the problem. sound like a valve train problem

Posted on Aug 10, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Starts ok when cold, when reaches normal running temp misses and runs rough.


Check ECT engine coolant temp sensor for sticking too cold letting engine run too rich causing flooding.

Dec 05, 2015 | Cars & Trucks

1 Answer

Runs rough when cold


misfire cold.
ever tune it up. sparkplugs can fail when cold and rich conditions
are present(normal for cold)
ever seen the 60k service points lists it the glove box operating manual
id bet its due to not doing service.
am i right?
no engine size stated. so no details guessed.

Jan 11, 2014 | 1999 Toyota Camry

1 Answer

1995 jeep gr cherokee laredo jumps when first star in morning and runs rough when ac or heat on


my guess, car unseen.
car has an A/T trans, and all A/T jump from park to drive
selection is made on a cold engine, due to the very fast idle speed.
what was the park and cold idle speed. and out door temps.
the lower out door temps, make idle speed , cold engine, even higher
but when the engine reaches 180F or more and holds, the RPM
is about 800 RPM (the FSM tells the exact amount and does vary for the unstated engine option) so at 800 the tranny don;t lurch, did it on a hot engine. so if idle speeds are wrong say so and say it with engine temps. or its all meaningless.
next :
runs rough, the engine (even parked?) is called misfire.
misfire on a good engine (full compression)
is:
1: bad spark (or never had a tune up ever) every 60k miles.
2: bad fueling. too rich, too lean (low idle) bad injectors (stuck or clogged, or wrong fuel pump pressure or bad Fuel pressure regulator)
3: bad fuel.

there is a test for each possible failure. all very simple test.
it takes $80 in gauge tools to find engine problems.

Dec 30, 2013 | 1995 Jeep Cherokee

1 Answer

Rough idle and blue smoke


Possible vacuum leak and or internal engine issue, have a cyl compression check done along with cyl leakage test

Nov 03, 2012 | Cars & Trucks

1 Answer

Randem rough idel and fuel/rich mix smell. Hot or cold ? Changed the water temp sensior for the eci and also new eci? 2001 Ford escort


I'm surprised you didn't get an error code, mainly on the spark plug wires. I would try those, they can cause a bunch of trouble, including rough idle, rich burning, everytime my Grand Marquis acted up, it was the spark plug wires. Of course it was also the only thing not covered in the warranty. Check it out.

Jul 30, 2010 | 2000 Ford Escort

1 Answer

My 2000 ford expedition idles rough when the outside temp is 65 degrees or colder in the summer there is no problem i have already replaced the idle control valve did not help


so, when the engine is burning a rich mixture, it runs rough. Please take it to an Autozone and ask that they read the ODB messages.

It could be that your idle mixture is too lean. So a fuel system cleaner may be the fix... or a carb cleaner...

Something to get the system to give the engine more fuel on a cool morning.... that will make it better!!-Jim

Oct 22, 2009 | 2000 Ford Expedition

1 Answer

Engine rough idle cold. passes smog once temp reaches thermostat


you can take apart the top section and blow out the small passage that's bellow the throttle plate.

May 01, 2009 | 1987 Toyota Tercel Liftback

Not finding what you are looking for?
2002 Kia Optima Logo

209 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kia Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

yadayada
yadayada

Level 3 Expert

76630 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8516 Answers

Are you a Kia Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...