0
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Amy Geeter
11
Asked
Why does my mama's 2005 Kia Optima act like it's not getting gas?
My husband just did a oil change, and oil treatment on my mama's 2005 Kia Optima, and now when we start the car it idles very roughly, and when we put it in gear it almost dies. What could be causing this?
Edited by: Amy Geeter ( )
1
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oldturkey0
91.2k
Answered
Accepted Answer
Okay, so you changed the spark plugs, check the face of the plugs and see what they look like. They should not be black with soot. Also change the wires since it is possible that they are cracked. If no result from that, it is possible that the Camshaft position sensor is not working right, as well as the Crankshaft position sensor. Clean the Idle air control valve, or replace it if necessary. The only other thing I can think of right now would be to clean the Mass air flow meter and definitely check the coils.
Thank you so much for your input. As I stated previously, the two spark plugs w/o coil packs were black, and the two with coil packs aren't. We have got the coil packs and wires ordered, and have to go pick them up tomorrow. I will let you know if they works, and see if you can offer any other suggestions. We also changed the crankshaft positioning sensor after we had to change the timing belt about 6 months ago.
I forgot to mention that a mechanic told us to check the catalytic converter. So my husband took the exhaust loose from the manifold, and it still runs like crap. Any ideas?
Amy Geeter,
Did it run okay before the oil change?
oldturkey03,
Not really. The idle was off a little, it has a vibration when idling or in gear, and other minor issues.
Amy Geeter,
He has now taken the EGR valve off (which is black inside), and the inside of the intake is black as well.
Amy Geeter,
A car needs 4 things to run: Air, fuel, spark and compression. If any one of these are missing the car won't run well or at all. My suggestion would be to check the spark plugs to make sure they are sparking. This can be done by removing the spark plug, contacting it to a metal engine component and turning the engine over briefly (Do not let it run for any extended period of time like this). Be sure to wear some nice thick gloves so you don't get shocked. Fuel should also spray out of the hole that the spark plug was in. Check all your cylinders and be sure each one is getting fuel and spark. Let us know what you find.
Phillip Takahashi,
Check the vacuum lines. Use a can of WD40 or equivalent and let the car idle. When you spray some of the WD40 of equivalent, the idle will increase when it will get sucked into the vacuum lines. It does sound a leak, check all those.
oldturkey03,
we're not sure about the spark plugs firing yet...my husband is checking that in a few. I was also wondering if the EGR valve is absolutely necessary. Also, where is the mass air flow and oil pressure switch on this car?
Amy Geeter,
Amy Geeter, righ now it sounds like we are all over he place with this one. You need to troubleshoot in a somewhat orderly fashion:-) otherwise you get lost and wont get it fixed. Lets start from scratch. The car idle poorly and almost stalled. Your husband changed the oil. What else did get done? DO you have the service engine soon light on?
oldturkey03,
now it's backfiring when idling, and cutting out when in gear.
Amy Geeter,
spark plugs and oil change. He also took off the EGR valve and air intake to check for blockages or damage.
Amy Geeter,
Again, have you checked for Vacuum leaks? Check the vacuum diagram for your Kia
oldturkey03,
Ok...he checked the spark plugs after letting it run (and backfire)and the two spark plugs with coil packs on them look good, but the two without coil packs are black. From left to right: #1-no coil pack, #2-coil pack, #3-no coil pack, #4-coil pack.
Amy Geeter,
And yes, we have checked the vacuum lines.
Amy Geeter,
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