What's causing a hesitation or bucking from the engine at high speed during kick down?

wiseman34wiseman34 Member Posts: 5
edited January 2015 in Toyota
I've replaced all (3) ignition coils, both O2 sensors, wires and plugs, air filter, fuel filter...Also experience some missing at low rpms as well...not sure what the problem is??
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  • wiseman34wiseman34 Member Posts: 5
    Yeahh on my 4-Runner :) It's got lots of miles on it but normally runs great
  • steverstever Guest Posts: 52,454
    Hopefully Shifty or @thecardoc3‌ will spot this thread and offer some suggestions.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,482
    We need a scan tool on that puppy, hopefully as the bucking and hesitation are occurring. Then bring us back those codes. I don't know what year car this is---hopefully an OBD-II engine.
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