03 v6 highlander loss of power while driving - Toyota Nation Forum : Toyota Car and Truck Forums
Highlander 1st Generation (2001-2007) Forum dedicated to the discussion of 1st generation Toyota Highlanders.

 
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post #1 of 4 Old 04-07-2019, 01:04 PM Thread Starter
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03 v6 highlander loss of power while driving

Hi, wondering if anyone can help. I have a highlander that while driving on the highway has lost power and could not accelerate, then it would die, but when restarted it would be fine again. Another time while driving on the highway it started accelerating on its own, had to put it in neutral and shut it down, after restarting it would be fine again. Dam scared the heck out of my wife.
Any help would be appreciated.
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post #2 of 4 Old 04-12-2019, 04:40 PM
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any chance she is accidentally pressing both pedals and not realizing it? My sister did that once and crashed into dad's garage, oops!
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post #3 of 4 Old 04-15-2019, 08:55 PM
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The slowing can be a lot of things, but they will usually set the MIL. A fuel pump could do that and might not set a code.
For the acceleration, I think you still have a throttle cable in that, but check. If it is throttle by sensor then I would start with that system. Also, if you do have floor mats, make sure they are out of the way. While I do believe there could be real cases of unintended acceleration, I have also seen the throttle get stuck on the mat.
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post #4 of 4 Old 04-20-2019, 06:55 AM
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I suppose it's possible a very dirty throttle body could cause the throttle to stick a bit. That seems to be a problem on some corollas where it mostly just causes an uneven idle.
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