car jerking

2009 KIA OPTIMA
86,500 MILES
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RRCAST86
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lately my car has been jerking when i slow down or push the break. It seems to be getting worse and more frequent what could be the cause of this? and would be an estimated price to get it fixed?
Apr 17, 2013 at 6:24 AM
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HMAC300
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scan for codes and check fuel pressure first
Apr 17, 2013 at 6:42 AM
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RRCAST86
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I was told that the spring in my transmission needed to be replaced what does that usually run cost wise?
Apr 24, 2013 at 3:11 PM
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HMAC300
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doesn't kia have a 100,000 mile powertrain warranty? if not have a trans guy give you aquote normally it has to come apart depending on what spring it is.
Apr 24, 2013 at 3:30 PM
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RRCAST86
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I do believe they do have that warranty now that you mention it, would the the transmission be covered under that? Im not really sure what powertrain is.
Apr 25, 2013 at 6:09 AM
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HMAC300
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engine transmission axle is powertrain
Apr 25, 2013 at 6:10 AM
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RRCAST86
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Thank you i will contact kia
Apr 25, 2013 at 6:19 AM
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RRCAST86
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I did contact kia the warranty covers internal parts, but they said they believe it might actually just need a software update. Can updating software inside a vehicle correct problems like that?
Apr 25, 2013 at 12:14 PM
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HMAC300
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yes it can I don't think there will be a charge for that either.
Apr 25, 2013 at 12:31 PM
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RRCAST86
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Awesome, you have been a great help.
Apr 25, 2013 at 12:35 PM