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99 Tacoma spark plug miss

Discussion in '1st Gen. Tacomas (1995-2004)' started by kdwellssr, Dec 31, 2019.

  1. Jan 2, 2020 at 4:47 PM
    #21
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    I had trouble finding what NGK's were needed for my truck so I chose the Denso since they said that was what was in the truck and 230 th miles on them....figured they'd be ok. Anyways. A bit of information on my situation. I was think if the check engine told me when the#3 plug miss fired and now it isn't telling me anything. So maybe it's not the coil or the wire. So I pulled the plug and checked it over. All Irridium spark plug do not come pre gapped. On the double gap plug one side was gapped at .020 and the other side I couldn't get the gap tool in the space at all. So I gapped the plug properly and now it's running properly. Also I went ahead and changed the rest of the plugs. Thanks to all who replied. I got a lot of real good information.
     
  2. Jan 2, 2020 at 5:55 PM
    #22
    CS_AR

    CS_AR Well-Known Member

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    Good deal. Where in AR are you located?
     
  3. Jan 2, 2020 at 6:14 PM
    #23
    xtremewlr

    xtremewlr Well-Known Member

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    I was looking for that! Think I have it saved on another computer somewhere.
     
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  4. Jan 4, 2020 at 10:19 AM
    #24
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    Mountain View area
     
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  5. Jan 4, 2020 at 10:25 AM
    #25
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    Back to the drawing board. I drove it about 40 miles today and the check engine light came on again. When I got home the Reader says miss fire detected on #2 and #3 cylinders. I figured if it would have said 3 and 4 then the coil and or wire. But 3 and two are not even connected. Number 2 wasn't messing up until I changed spark plugs. Any one have spark plugs that go bad right away? I'm thinking about cleaning up two of the old spark plugs and putting them in the 2 and 3 location to see if plugs went bad. If same then I'll need to move to other parts.
     
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  6. Jan 4, 2020 at 10:27 AM
    #26
    CS_AR

    CS_AR Well-Known Member

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    Up in the beautiful part.

    upload_2020-1-4_12-19-11.jpg

    upload_2020-1-4_12-17-53.jpg
     
  7. Jan 4, 2020 at 10:32 AM
    #27
    CS_AR

    CS_AR Well-Known Member

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    I wonder if you have some wires that are breaking down? If you were close to Conway, I have some good working wires that I could give you to try.
     
  8. Jan 5, 2020 at 7:41 AM
    #28
    thenodnarb

    thenodnarb Well-Known Member

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    iridium plugs you do not gap. just install them. you try and gap it and you'll break it.
    your plug kit should come with new boots for the coil sides as well. when mine started to misfire it was the boots. like you, i hadn't changed the oem wires ever that i recall. 275k miles or so at that point. the contacts inside one boot was fried. new wires fixed the problem.
     
  9. Jan 5, 2020 at 8:15 AM
    #29
    Blue92

    Blue92 Well-Known Member

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    So what plugs did you buy? Like what part number? Cause the manual in the glovebox, if you have one, specs out a dual electrode copper plug.
    0222181010.jpg

    I know the V6's in particular can be finicky with plugs. Did you replace the 3 wires yet? Maybe I missed it if you did.
     
  10. Jan 10, 2020 at 11:12 AM
    #30
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    I bought the K16TR11 spark plugs. I tore into it yesterday. I figured since #3 and #2 were the problems I'd do some changing. I moved the #3 coil to the #5 position. That way if I ran it and light says #5 misfired then I'd figure coil. Then I moved the spark plugs around to get the ones that were problems to a place that seamed good. Put a good plug in #2 position. Those new spark plugs were gaped at .020 on one side and about .014 on other side of electrode. I started the engine next morning and it ran good. Drove it to town which is 20 miles. Stilling running good. Stoped and went in store. When i came back out and started truck it was missing again. Drove it home and put it on tester. Says same #2 and #3 misfire. Wonder if the injectors could be the problem.
     
  11. Jan 10, 2020 at 11:18 AM
    #31
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    The center electrode on these plugs are about the same diameter as a standard spark plug but with two ground contact points. I did what I thought was best on them due to the gap issue. Not finding any information on these plug available on internet. Figured they were pre set but checking shows they were not set at the specs my truck called for at .043. they were set at .020
     
  12. Jan 10, 2020 at 12:01 PM
    #32
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    I set the gap on each ground strap to .043. They were pre set to .018. any thoughts?
    DEN3195_b gap.jpg
     
  13. Jan 11, 2020 at 7:36 AM
    #33
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    Started the truck again this morning . Went about 1 mile to the post office and home. It ran fine. Any idea of why it would run fine when cold but after a good warming up it starts to misfire on just two cylinders? I put some injector cleaner in the gas and hope to see if the fuel injectors clean up any?
     
  14. Jan 11, 2020 at 7:46 AM
    #34
    Glamisman

    Glamisman Well-Known Member

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    do a compression check, there has to be enough compression for the fuel mixture to ignite.
     
  15. Jan 11, 2020 at 8:58 AM
    #35
    KdF

    KdF Old Rednek Type

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    The total should be the gap, not each side. I learned that the hard way. Also, I had my injectors replaced when the truck warmed up and it started missing bad, like shuddering the whole truck. The Injector read fine when cold, but when warmed up it failed.
     
  16. Jan 12, 2020 at 6:40 AM
    #36
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    So a injector may misfire when warm but do just fine when cold? I ran the truck to the post office again. This time I turned the engine off when I got there and the engine was warmed. When I restarted it to return home ..once again the #2 and #3 detected misfire conditions.
     
  17. Jan 12, 2020 at 6:40 AM
    #37
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    Where did you get your information about the gap settings? The center electrode on my plugs is the same general size as a standard spark plug electrode. It is not the little tiny wire thingy.
     
    Last edited: Jan 12, 2020
  18. Jan 12, 2020 at 2:03 PM
    #38
    KdF

    KdF Old Rednek Type

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    Yes, confirmed my the Toyota Mech (Not a Stealership). 1 was crappin out Hot only would run fine for about 3 miles then start shaking the whole truck and came the misfire code, but I had a box of injectors I got when a Toyota shop closed years ago, so I had them replace them all.


    I found that somewhere on the Web. Threads and arguments abound, but My truck seems to like it. I used .022 on each side as the Book calls for a gap of .043 .Electricity is lazy, it will hit the closest thing to the center electrode, so my feeler guage worked OK.
     
  19. Jan 15, 2020 at 7:52 AM
    #39
    kdwellssr

    kdwellssr [OP] Well-Known Member

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    I agree that electricity is lazy and will find easiest way to travel so where it jumps to ground strap on yous is only .022 correct? When I removed my old spark plugs they gaped tested on each side of the electrode at .060+... That's a long way for the .022. The plugs I pulled were original from factory plugs.
     
  20. Jan 15, 2020 at 3:28 PM
    #40
    KdF

    KdF Old Rednek Type

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    Each side .022. That is what I'm runnin.
     

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