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Got code P0300

Discussion in '1st Gen. Tacomas (1995-2004)' started by Gavinmotox, Jul 9, 2023.

  1. Jul 9, 2023 at 8:09 PM
    #1
    Gavinmotox

    #1
    Gavinmotox [OP] Member

    Joined:
    Jul 9, 2023
    Member:
    #428645
    Messages:
    15
    Gender:
    Male
    First Name:
    Gavin
    Vehicle:
    2002 silver Tacoma 3.4L 4x4
    Hey everyone, I got a P0300 code (random/multiple misfire) today. Lately my truck has been feeling a little under power whenever driving it. It takes more throttle to get it going. And when I cold start the truck, the truck will have a rough idle and shake for 10-20 seconds. And after that, it will idle normally and sound fine. I changed the spark plugs and coil packs around 20,000 miles ago. And I have built injectors that have around 20,000 miles on them. Truck is the 3.4L v6. Does anyone have an idea what could be causing this code?
     
    Gavinmotox, Jul 9, 2023
    #1
  2. Jul 9, 2023 at 8:16 PM
    #2
    Dm93

    #2
    Dm93 Test Don't Guess

    Joined:
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    2014 DC OR 6spd 4x4
    Predator tube steps, Ranch Hand grill guard, Magnaflow CatBack exhaust, Toyota tool box & bed mat, 2LO Module by @Up2NoGood, Rearview Compass/Temp Mirror, Tune by @JustDSM.
    Has the fuel filter been changed?
    Fuel pressure checked?
     
    Dm93, Jul 9, 2023
    #2
  3. Jul 9, 2023 at 8:19 PM
    #3
    Gavinmotox

    #3
    Gavinmotox [OP] Member

    Joined:
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    Member:
    #428645
    Messages:
    15
    Gender:
    Male
    First Name:
    Gavin
    Vehicle:
    2002 silver Tacoma 3.4L 4x4
    Fuel filter was changed 20,000 miles ago, I had a misfire 20,000 miles ago and I replaced lots of things that could cause it and it went away.
     
    Gavinmotox, Jul 9, 2023
    #3
  4. Jul 9, 2023 at 8:25 PM
    #4
    Dm93

    #4
    Dm93 Test Don't Guess

    Joined:
    Mar 3, 2015
    Member:
    #150066
    Messages:
    13,724
    Gender:
    Male
    Texas
    Vehicle:
    2014 DC OR 6spd 4x4
    Predator tube steps, Ranch Hand grill guard, Magnaflow CatBack exhaust, Toyota tool box & bed mat, 2LO Module by @Up2NoGood, Rearview Compass/Temp Mirror, Tune by @JustDSM.
    I would want to look at misfire counters and see which cylinders are misfiring and go from there.
     
    Dm93, Jul 9, 2023
    #4

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