Question about 2002 Kia Spectra

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Car wont shift properly

Had a code for a bad mass air flow sensor, replaced it and same problem. Car idles fine and will drive fine, as long as you dont give it to much gas. Bogs down when u give it lots of gas and seems like passing gear isnt working properly

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  • josh1111 May 11, 2010

    pcv valve may be sticking, a common problem. it is part of the vacuumm

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  • 319 Answers

Sounds more like a vacume problem than a sensor, but the way I would start is go threw all the vacume lines you can. they are easy and very cheap to replace. check for any insignificant defect cracks warps distortions in the line. Anything. Then remove your air filter intake line to the throtle body. remove the throtlebody its only 4 bolts and usualy to sensors. The throtle body may just be dirty, clean it out inside and out. Then chek you aire intake sensor, sometimes its called an idle sensor, last check the throtle body sensor. Also if you still have your old mass airflow sensor clean it up with the proper mass air flow cleaner and return the new one. Because obviously it wasn't the problem.

Now is the time I tell you all about proper maintenace. Did you replace your air filter, when is the last time you changed your plugs and wires. I really like the bosch platinum 2 plugs. They burn a litle hot but not to hot, which means more burn and cleaner, less emissions. Hint hint to you that have to pass a emissions test every year.

You may want to go on utube and check out a product called Seafoam. I have had a lot of success with this product. It goes in your gass tank in your oil, and the third part goes in your vacume going into your injectors. It does clean a lot of **** out of your car. But I warn people that this is a at your own risk kind of thing. I know how to take my engine apart and fix it do you. Because I wont come to your house and rebuild your engine if you mess it up. Sorr for the rant but l have to give that litle disclaimer out.

After you have worked on all the things I have told you I believe you will have fixed your problem, if there are any problems or questions send me a message and let me know.

Tepfy

Posted on May 01, 2009

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