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2001 Toyota Tundra 4.7L 4wd jerky hard acceleration

Discussion in 'Performance and Tuning' started by First Tundra, Nov 11, 2017.

  1. Nov 11, 2017 at 9:25 PM
    #1
    First Tundra

    First Tundra [OP] New Member

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    Just picked up this Tundra from a relative that has been neglected severely. Runs good at normal or mid throttle but at hard acceleration engine jerks as if you’re pumping throttle hard. Ran diagnostics with obd2 scan tool and got the following codes P0141 P0155 P0161 P0440 P0441 P0446
    Advice on best route to start and what to check in abc order would be greatly appreciated...
     
  2. Nov 11, 2017 at 11:44 PM
    #2
    dirtydeeds

    dirtydeeds New Member Vendor

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    more than I can list here
    First thing I would do is go straight to the dealer with your vin number and buy a brand new, slightly over priced (maybe) gas cap.

    Then hard reset the ecu. And post up any new codes that pop up from there.

    If I don’t respond in a timely fashion give a call. 760-877-4234.
     
    T-Rex266 and First Tundra [OP] like this.
  3. Nov 12, 2017 at 7:29 AM
    #3
    Wynnded

    Wynnded What MPG...

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    Maybe take a peek at the air filter as well.
     
  4. Nov 12, 2017 at 1:27 PM
    #4
    First Tundra

    First Tundra [OP] New Member

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    I’ll check em out ASAP
     
  5. Nov 12, 2017 at 8:16 PM
    #5
    First Tundra

    First Tundra [OP] New Member

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    Cleaned MAF and throttle body and checked air filter which didn’t appear dirty visually but I’ll replace it anyway. Also changed the gas cap. Drove it just a few minutes and no codes came up yet but the hard acceleration is still jerking like someone pumping the throttle
     
  6. Nov 14, 2017 at 3:41 PM
    #6
    First Tundra

    First Tundra [OP] New Member

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    After driving the truck to work and back home I ran a code scan again to find the following errors P0141 P0155 P0161
     
  7. Nov 14, 2017 at 4:47 PM
    #7
    First Tundra

    First Tundra [OP] New Member

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    How can I test to see which one it is?
     
  8. Nov 14, 2017 at 4:50 PM
    #8
    First Tundra

    First Tundra [OP] New Member

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    Rebuilt engine with about 90,000 on it
     
  9. Nov 14, 2017 at 6:03 PM
    #9
    Wynnded

    Wynnded What MPG...

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    I suspect that those may be O2 sensor codes. How did the code reader define them?
     
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  10. Nov 14, 2017 at 6:11 PM
    #10
    Wynnded

    Wynnded What MPG...

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    How long ago? Recent, like very recent?
     
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  11. Nov 14, 2017 at 6:25 PM
    #11
    Wynnded

    Wynnded What MPG...

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    Misfires are usually P030X codes. I wonder if the timing belt jumped.
     
  12. Nov 15, 2017 at 5:06 AM
    #12
    First Tundra

    First Tundra [OP] New Member

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    Correction... motor was replaced and currently has 90000 on it.
    Changed all the plugs and one coil that appeared to be misfiring also replaced air filter. Runs a lot smoother but still jerking at hard throttle. I’ll run a code scan after driving home from work to see what shows up and post the results
     
    Last edited: Nov 16, 2017
  13. Nov 16, 2017 at 6:38 PM
    #13
    First Tundra

    First Tundra [OP] New Member

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    Ran a codescan specific for Toyota Tacoma 4.7 with ActronCP9185 and got this list:
    P0141
    P0155
    P0161
    P1305
    P1310
    P1315
    P1320
    P1325
    P1330
    P1340
    It seems as though the more I do to try to help the more errors are come up with
     
  14. Nov 16, 2017 at 7:02 PM
    #14
    Wynnded

    Wynnded What MPG...

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    OEM Upgrades: TRD PRO BBS Wheels TRD S/C, OVTune and +2 psi pulley TRD Rear Sway Bar Fox TRD Pro Shocks Limited mirrors (auto darkening/backup camera/power fold/puddle lights) Limited Grill Mod Automatic Climate Controls Mod Automatic Headlamp Mod Sequoia Front Sway Bar Mod Sequoia Transfer Case Mod Sequoia Leather Steering Wheel Mod Sequoia Limited Gage Cluster Mod Sequoia LED Headlamp Upgrade Window Tint Fake Manual Transmission Mod 10" BAMufflers Stainless Catback Engine Block Heater Illuminated Ignition Key Ring Mod Deck Rail System w/cleats
    O2 sensor codes
    Igniter circuit malfunction codes for multiple cylinders
    Cam sensor code

    Did this just begin happening out of the blue one day? Was the engine run especially hard one day and then it started running like this? Was the engine over-revved hard?

    I'm still wondering if this is symptomatic of the timing belt being off a tooth but honestly, I've never been involved with this engine. The only way to check if it's off entails a reasonable amount of disassembly if I'm guessing even reasonably accurately. You'd have to remove the timing cover(s) and crank pulley, and likely a bunch of other shit just to get that far.

    The other thought is that it could be a wiring issue where rodents got in there and snacked away on the ignition system. That may actually be the easier initial search. Look for nests and poop. But you've already been working on it, you woulda noticed I'm sure. Dang man.
     
  15. Nov 17, 2017 at 4:57 AM
    #15
    First Tundra

    First Tundra [OP] New Member

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    I’ll take it to the shop first chance I get and have em run timing check on it to be sure
     
  16. Nov 18, 2017 at 9:00 AM
    #16
    Scpringle

    Scpringle New Member

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    running boards , TRD sway bar and tundra 08 SR5 wheels. FRACmod, pop&lock and backup sensors installed .
    your due for a timing belt change at 90K on the 4.7L anyway
     

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