Join Date: Jan 2010
Location: Massillon, Ohio, USA
Drives: 2007 SpectraLX, 2006 SpectraSX, Kubuntu
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Welcome to kia-forums and thank you for reaching out to help someone!
Here are some more tips for the "Original Poster"...
I agree that the motor mounts are probably gone. They were not too well made in early Sephia/Spectras. Check out rockauto.com for parts (or ebay!).
If you have a manual transmission look at StreetKiaz.com.. A regular there is making replacement bushings to correct a very sloppy shifting (1-2,2-3). There are lots of great comments about the improvements over original OEM bushings.
You may want to try to clean the IAC (idle air control) valve. It's located in the large aluminum "tube" (throttle body) in the back of the engine. There is a butterfly valve/round metal disk that opens and closes to control the idle speed. The "throat" of the throttle body and the butterfly valve really get carboned up over the miles and years...Get a can of carburetor/choke cleaner, some plumbers "flux brushes" (Harbor Freight) , and a soft cotton rag... and give her a good cleaning...Push the butterfly valve open (push on bottom of valve) and clean around the areas it touches when it's closed..The butterfly will stick to this stuff if not removed and will cause starting problems..
Also remove and clean the EGR valve that is usually located in a large rubber grommet somewhere on the valve cover. It will have a black rubber hose hose attached to the other end. The carb/choke cleaner will work here also
Spark plugs and wires are other items that will add to the starting problems if they are worn out. CHECK the gaps of the new plugs as EVEN the pre-gapped plugs are usually gapped wrong for KIAs... The correct spark plug gap settings are on a label attached under the hood. I'd bet the auto parts place (like Advance or Autozone) would check and set them correctly for you ("if" you supply the correct numbers from the label).
KIAs like NGK brand plugs.
These are items that don't cost a lot and WILL improve the performance of the car EVEN if they don't totally "cure" your problems. They will at least improve your chances of making it run better.