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1998 Taco, persistent p0306, ECU?

Discussion in 'Technical Chat' started by RyJones, May 13, 2013.

  1. May 13, 2013 at 5:08 PM
    #1
    RyJones

    RyJones [OP] New Member

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    Ry
    Great Pacific NorthWet
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    Hi,
    V6 1998 TRD, lightly abused for 135k miles. Throwing 0306, had plugs, wires and bunch of other stuff replaced. Ran OK for 300 miles then back to rough running with CEL.

    After a while, it goes open loop and runs OK for 10 minutes or so.

    Since plugs and wires are new, what's next? ECU? Don't trust the shop that took $1650 to not fix the issue to take another go at it (they took care of other issues, so it wasn't a waste of time)
     
  2. May 13, 2013 at 7:38 PM
    #2
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    Navarre, FL
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    1997 Tacoma 4X4 AKA "Blue Beast"
    Multi-point tow hooks, new bored 2.7L engine, custom paint. 3 inch adjustable Fabtech front coils, 2.5 inch rear AAL. Front Aussie locker. LED bed lights. Full LED conversion interior and exterior. Relentless Fabrication front and rear bumpers. 4X4innovation sliders. BAMF bed rack. CVT rooftop tent.
    Bad/dirty injector? Low compression? Those will also cause a misfire code.
     
  3. May 13, 2013 at 9:16 PM
    #3
    RyJones

    RyJones [OP] New Member

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    Good call on the injectors; I forgot to mention they blew a can of injector cleaner through 6. That doesn't mean that injector is gtg, though.

    I don't know that they checked compression. Would bad compression come and go like that?
     
    Last edited: May 13, 2013
  4. May 14, 2013 at 7:10 PM
    #4
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

    Joined:
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    Member:
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    Messages:
    9,460
    Gender:
    Male
    First Name:
    Bill
    Navarre, FL
    Vehicle:
    1997 Tacoma 4X4 AKA "Blue Beast"
    Multi-point tow hooks, new bored 2.7L engine, custom paint. 3 inch adjustable Fabtech front coils, 2.5 inch rear AAL. Front Aussie locker. LED bed lights. Full LED conversion interior and exterior. Relentless Fabrication front and rear bumpers. 4X4innovation sliders. BAMF bed rack. CVT rooftop tent.
    Depends on the cause of the low compression. Sticking valves can cause periodic low compression.
     
  5. May 14, 2013 at 9:21 PM
    #5
    RyJones

    RyJones [OP] New Member

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    Great Pacific NorthWet
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    Thanks. Hopefully I can find a mechanic to look at it - the one I used for years retired, and the new guys aren't cutting it.
     
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