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Hello and thank you for your question,Before you change anything else, try removing the negative battery cable and then remove the throttle body and give is a good cleaning inside and out. After doing so, reinstall it and start the engine and let it idle for about 15 to 20 minutes which will allow the PCM (computer) to relearn the closed throttle values. In some cases sludge build up in the throttle body can cause this type of problem when the computer has lost proper voltage so try the cleaning first . Post back with the results and we can work from there if need be.