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2001 toyota 4runner loss of power will not go faster than 40 mph.


I am having very severe acceleration and power problems with my 2001 4runner limited. It has been getting progressively worse over the past 3 weeks. My gas mileage is VERY poor. When starting from a stop, it hesitates and "revs" (kind of jerks). I have to release the gas peddle to get up to speed. When the problem first happened, after I got to the intended speed, it would drop back below 30 mph if I tried to go up an incline. At this point, I cannot even get it over 30 mph. Two mechanics are unable to find the problem. No codes are showing (no check engine light). They said it IS NOT the fuel filter or spark plugs. I had the catalytic convertor replaced two years ago. (It is not in 4 wheel drive) The MAF has been cleaned (twice).

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  • rco101c327 Feb 01, 2009

    2001 Toyota 4runner. Engine seems to be missing accelerating, and while trying to hold speed on inclies. Check engine light is on, blinks at speeds over 50 m.p.h. Can this be a bad coil pack? Engine seems to want to run smoothly at speeds of 30 m.p.h. an below.

  • Toyota Ed May 11, 2010

    2 Questions: Has anyone checked the timing belt settings?



    Has anyone looked at the rear brakes to see if they are stuck on?

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  • 21 Answers

MAF bad

Posted on Apr 21, 2010

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