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pete 5/5/2010

2000 Toyota 4Runner SR5 6 Cyl 3.4L


Why is my car hesitating and has loss of power?

I have replaced fuel pump, fuel filter, all plugs and wires, air filter too. Only code that shows on computer is system runs lean. The code has been on since 4 years...but the loss of power and hesitation started about a month ago. The exhaust checked out ok too. I don't know where to go next. Any recommendations?

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pete 5/6/2010

Fixed my own problem!!! The Mass Air Flow Sensor was dirty. I pulled it out and cleaned the two electrodes (thin plates) in the wind tunnel pipe area. Make sure they do not break or get bent. Put it back on and instant fix. My engine light went away, the hesitation was gone, and starts up a lot quicker too.


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