Question about 2004 Kia Optima

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My 2004 optima has 130000 runs little ruff check engine light came on code says running rich like it could be vacumm leak so replace fuel injector regulator did not solve any thing else it could be?

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  • 3 Answers

Intake leak, bad plugs, pre cat oxygen sensor. take to kia and have them run full diagnostics. Most likely pre cat oxy sensor or bad plugs and wires.

Posted on Oct 13, 2013

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6ya6ya
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Posted on Jan 02, 2017

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tommyboinow
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SOURCE: 2004 KiA SORRENTO engine light on - misfire #5 cylinder

if it is a misfire, then that means it is probably the plug or the wire, change those first, if not then yes check the injector.

Posted on Nov 26, 2008

seans46
  • 161 Answers

SOURCE: 2004 KIA Optima LX timing belt/water pump

The thing is your doing the timing belt the water pump is right their with it . it should cost you much more at all besides the cost of the water pump. When doing a timing belt I have a rule that I go by The timing belt/seals =cam , crank , any pulley & tensioner & water pump all get replaced at the same time. I did a t-belt on a Audi A-8 very complex whole front of car has to come off as well, he didnt want to do w-pump & thermostat his thermostat was their as well not even a month later the water pump gave out he had to pay double the price because he didnt want to do it when I had it apart the first time. And make sure mechanic is ase certified . good luck

Posted on Jul 02, 2009

roniecon
  • 6826 Answers

SOURCE: 2003 kia # 3 misfire/ runs rough

Replace the coil for number 3 cylinder.

Posted on Nov 11, 2009

  • 105 Answers

SOURCE: 2004 kia optima

sounds like timing belt

Posted on Jan 25, 2010

Testimonial: "thank you so much for the tips to try.... this seems like it will narrow down my problem... will let you know which solution if the fix."

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SOURCE: my check engine light keeps coming on on my 2004 kia optima lx

Check with the place that checked the codes for you. Maybe they can test the IG sensor for you. That might help. Otherwise check all the connections relating to the sensor.

Posted on Mar 15, 2010

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2 Answers

Truck starts but only chuggs and blows out black gas smoke as engine lite flashes no throttle response


black smoke is too much fuel
check for leaking injector and injector seals
check for excessive fuel pressure
run the fault codes as you will have some from the engine light on

Jul 02, 2015 | Cars & Trucks

1 Answer

The Check engine light is on and gives code for cylinder 1 miss fire. It runs ruff and idle hard. Why does it do this and what can i do to fix.


Swap the wires on the fuel injector and see if the code then switches to that cylinder. Could be a bad injector.

Feb 28, 2015 | 2004 Chevrolet Chevrolet Impala

1 Answer

2004 Kia Optima PO171 Check engine light came on


P0171 = System too lean, bank 1 - probable cause is - Intake/exhaust leak, Air system, MAF/VAF sensor, fuel pressure pump, injector(s), HO2S.

Hope that helps, a little anyway.

Feb 25, 2015 | 2004 Kia Optima

1 Answer

My 1994 Cadillac Seville is running excessively rich.


I guess my first question would be, is the check engine light on ?
If the fuel system is too rich the O2 sensors should be reporting that to the computer. There could be a trouble code that would point you in the direction of the problem.
Otherwise, it could be a weak injector, or a wiring problem that is keeping one or more injectors grounded.
Are all of the spark plugs fuel fouled ?
No problems with the air filter and intake ?

Apr 16, 2013 | Cadillac Cars & Trucks

1 Answer

2004 MAZDA MPV P0171


The code is for fuel system lean bank one. That means the computer can not make the engine run rich enough to get the O2 sensor to switch from lean to rich.
It should also set a code for the cylinder miss, the problem could be dirt in the fuel filter or a problem with one of the injectors based on your statement about running low on fuel. It could also be a low fuel pressure problem due to stuff clogging up the screen in the gas tank. Sometimes the problem is the O2 sensor but I doubt it in your case.
You could try replacing the fuel filter and running some injector cleaner thru the fuel system to start with. The code needs to be cleared after the miss is repaired to see if the light will stay off.

Sep 01, 2012 | 2004 Mazda MPV

3 Answers

Check engine light


A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

Jul 02, 2009 | 2004 Dodge Ram 1500

2 Answers

Engine runs ruff


you may have a valve or valves leaking which will cause it to run rough, have a leak down test done or a compression test

Jun 22, 2009 | 1994 Volvo 940

1 Answer

2001 Tahoe: Hard to start, idles rough, check engine light on.


Flashing check engine light is missfire, fuel pump probably causing multiple tries to start.Having to build fuel preasure,vac leak on one side of intake probably causing rich/lean condition.Also check back preasure to cat ,Sound like you are moving down right track.Mas air flow would probably set lean code bank1 and lean code bank2

Jun 19, 2009 | 2003 GMC Yukon XL

6 Answers

2003 kia optima 6 cylinder hard to start after fillups only


I had the same problem along with a rough idle and found out it was my EVAP canister.

Dec 10, 2008 | 2004 Kia Optima

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