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2007 toyota tacoma rough start in cold mornings but runs near perfect after

Discussion in '2nd Gen. Tacomas (2005-2015)' started by bla11, Dec 1, 2022.

  1. Dec 1, 2022 at 10:27 AM
    #1
    bla11

    bla11 [OP] New Member

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    I have a problem with my 2007 toyota tacoma 2.7L where on a really cold morning the truck will start and idle low causing the truck to shake. but will smoothen out if i turn it off and back or or sometimes it will smooth out.
    I have 3 codes which are p0300 p03004 p03003. truck will start every time and run good after that very first start in the morning. I hace changed coil packs and put NGK plugs in it
     
  2. Dec 1, 2022 at 10:48 AM
    #2
    obscurotron

    obscurotron Well-Known Member

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    Too many to list, and I've probably forgotten a bunch.
    I had an '01 with the 2.7L with similar symptoms. HG was bad (could smell it in the exhaust, but there was not a ton of white smoke). You may want to drive it, let it sit overnight, pull plugs in 3 & 4, and scope it to check for coolant pooled on the cylinders.
     
    TnShooter likes this.
  3. Dec 1, 2022 at 1:09 PM
    #3
    NmapFE

    NmapFE Well-Known Member

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    Try running a few tanks of gas that don’t have that 10% ethanol (?).. I had that same issue a few weeks back and after the change it stopped doing it. No problems since and starts strong on cold mornings. This may not be the issue, but worth testing it.
     
  4. Dec 1, 2022 at 2:30 PM
    #4
    bla11

    bla11 [OP] New Member

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    @NmapFE I never use gas that has 10% ethanol i always use 100% gas that’s the thing
     
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  5. Dec 1, 2022 at 2:33 PM
    #5
    bla11

    bla11 [OP] New Member

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    @obscurotron I really don’t think it’s the head gasket it just now started doing it because it’s starting to get cold out. The truck was starting perfect when it was warmer outside just last week it started because the temps in the morning here are like 20°-40°
     
  6. Dec 1, 2022 at 2:33 PM
    #6
    bla11

    bla11 [OP] New Member

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    The truck only has 142k
     
  7. Dec 1, 2022 at 2:34 PM
    #7
    TnShooter

    TnShooter The TacomaWorld Stray

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    Did your truck also have P codes?
     
  8. Dec 1, 2022 at 2:40 PM
    #8
    HondaGM

    HondaGM Call sign Monke

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    is the coolant low...you said it idles low
    so it doesnt miss?
     
  9. Dec 1, 2022 at 5:00 PM
    #9
    NmapFE

    NmapFE Well-Known Member

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    No
     
  10. Dec 1, 2022 at 5:01 PM
    #10
    NmapFE

    NmapFE Well-Known Member

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    Ok .. just trying to think of simple issues first
     
  11. Dec 1, 2022 at 7:51 PM
    #11
    ZMan2k2

    ZMan2k2 “Hold my beer and watch this!”

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    Clean the throttle body and MAF.
     

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