My highlander has been fluttering for months now and some days it's not so bad and other days it's terrible. I've had the spark plugs, coils, fuel injectors, fuel pump, catalytic converter and my gas tanks cleaned and it is still happening. I've had it to my mechanic and to Toyota for a week and no one has solved the issue. I have 294k on it. Could it be the ECM? Any help or suggestions would be appreciated. Thanks!
How long has your 2010 Toyota Highlander had this problem?
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