I have a 2009 1.8 Auto Altis which has developed a problem in the past couple of months. Sometimes while I'm driving the car seems to hesitate/fluctuate. The RPM meter starts fluctuating and for those moments I have lost power. And then seconds later the RPM steadies and power is back. I can still hear the engine, and the noise seems perfectly smooth which leads me to believe that it may be some sort of electrical problem. This keeps repeating itself randomly without any warning, and in some cases I can no longer mantain even 30-40km/hr speeds because of the constant fluctuations. There are no check engine lights. The problem seems to happen more frequently the more aggressively I drive, or on a longer drive.
I have taken it to Toyota and they haven't been able to diagnose the problem. Any advice/suggestions would be greatly appreciated.
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