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I have a 2007 Outback. I disconnected the battery yesterday

Customer Question
to change the bulb in...
I have a 2007 Outback. I disconnected the battery yesterday to change the bulb in the driver side headlight. Today, my wife is reporting that the car runs very poorly (misfire, cannot start from iddle,...). Any clue?
JA: Have you changed a battery before?
Customer: Yes it was done a couple of years ago.
JA: Are you fixing your Outback yourself? What have you tried so far?
Customer: Nothing it is my wife's car and I did not check it since yesterday
JA: Anything else you want the mechanic to know before I connect you?
Customer: not really
Submitted: 1 year ago.Category: Subaru
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Answered in 15 minutes by:
10/17/2016
Subaru Mechanic: Peter Bagley, Auto Service Technician replied 1 year ago
Peter Bagley
Peter Bagley, Auto Service Technician
Category: Subaru
Satisfied Customers: 1,019
Experience: master tech
Verified

Hello and welcome to just answer and allowing me to assist you.I may need to ask questions to get a better picture to help.When you replace or disconnect a battery the ECU goes through a time of relearning all the inputs and driving habits to control the engine managements. Also in some cases if it does not correct itself the throttle body builds up deposits that need to be cleaned .This can be done using a proper throttle body cleaner sprayed into the opening using a tooth brush cleaning it while holding the throttle plate open.. use a light to see inside to make sure it's all clean. https://www.youtube.com/watch?v=41yFXjibtLY

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Customer reply replied 1 year ago
Should we continue to drive until it relearns itself?
Subaru Mechanic: Peter Bagley, Auto Service Technician replied 1 year ago

If that is the issue after driving a coupls times it should, but like I said if it don't then next step is to clean the throttle body as in the video I sent, varnish restricts the plate from returning to original position and the ECU does not recognize this.

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Peter Bagley
Peter Bagley
Peter Bagley, Auto Service Technician
Category: Subaru
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