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Ignition coils

Discussion in '1st Gen. Tacomas (1995-2004)' started by Bikerdude, Apr 3, 2020.

  1. Apr 3, 2020 at 9:05 PM
    #1
    Bikerdude

    Bikerdude [OP] New Member

    Joined:
    Mar 30, 2020
    Member:
    #323355
    Messages:
    3
    Gender:
    Male
    First Name:
    Kirk
    Vehicle:
    1999 SR5 5 speed 4WD lifted ext cab
    K&N model 77 cold intake, 3” lift
    I have the previous owners (PO) service records for my new old toy (1999 3.4L 5sp 4WD Tacoma) and discovered one ignition coil was replaced with an after market (Non Denso) about a year ago with the service tech note that they should bring the truck back in and replace the other two when the parts come in. I also see they charged about $400 for changing out one forward coil which takes about 15 minutes.
    Has anyone had hesitation or engine missing at hwy speed with mismatching coils? PO stated plugs were changed when the timing chain was changed about 40k ago. I’m leaning towards changing all 3 coils, wires and plugs so I know it’s a total OEM refresh and gapped to specs. Then I can see if hesitation issues resolve or I need to go down another rabbit hole. Any advice on best coils? Shows Densos as OEM, but not apposed to upgrading if truly beneficial. Thanks
     
  2. Apr 5, 2020 at 2:46 PM
    #2
    License2Ill

    License2Ill Woke like a Coma Toyota Tacoma

    Joined:
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    First Name:
    Ian
    It's a dry heat thou, AZ
    Vehicle:
    2004 SC'd 5VZ DC 5spd 4x4 TRD.GOV
    Bailing wire & Duct tape
  3. Apr 5, 2020 at 3:25 PM
    #3
    Black DOG Lila

    Black DOG Lila Well-Known Member

    Joined:
    Jun 14, 2019
    Member:
    #296344
    Messages:
    4,937
    Virginia
    Vehicle:
    2003 Tacoma SR5 2.7 5 speed 4WD
    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Welcome aboard new member
     
  4. Apr 8, 2020 at 9:28 PM
    #4
    Bikerdude

    Bikerdude [OP] New Member

    Joined:
    Mar 30, 2020
    Member:
    #323355
    Messages:
    3
    Gender:
    Male
    First Name:
    Kirk
    Vehicle:
    1999 SR5 5 speed 4WD lifted ext cab
    K&N model 77 cold intake, 3” lift
    I just received the new set of OE Denso coils, plug wires and plugs today from Yotashop. They shipped and were delivered in two days. I believe a total OEM refresh should help. I also cleaned out the intake, MAF sensor and filter. Heck, it's new to me so I detailed the engine bay while I was there. Should be a nice project this weekend. I will update when finished. Thanks for the help.

    1BDCC82B-07BE-4061-8B64-BAE9BF301E5F.jpg
     
    TWJLee and crazytacoman like this.
  5. Apr 11, 2020 at 7:43 PM
    #5
    Bikerdude

    Bikerdude [OP] New Member

    Joined:
    Mar 30, 2020
    Member:
    #323355
    Messages:
    3
    Gender:
    Male
    First Name:
    Kirk
    Vehicle:
    1999 SR5 5 speed 4WD lifted ext cab
    K&N model 77 cold intake, 3” lift
    Wow! Coils, wires and plugs replaced. I haven’t seen plugs so worn in my life. Barely a nub, I’m surprised is wasn’t missing more and throwing codes. Test drove it on the freeway and feels much better. No hesitations! On to the next project.

    C8234EBC-5E20-435E-9788-DCC40236CE53.jpg
     

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