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Multiple misfires after rebuild

Discussion in '1st Gen Tundras (2000-2006)' started by Brynden29, Jul 16, 2022.

  1. Aug 26, 2022 at 10:09 PM
    #511
    Aerindel

    Aerindel New Member

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    This at least is consistent as when the AC is on, the engine revs up slightly to compensate for the drag and this seems to be problem only at low idle.

    Also, you are amazing.
     
    Brynden29 [OP] and FrenchToasty like this.
  2. Aug 27, 2022 at 5:39 AM
    #512
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    At idle the LTFT were both at -4 or so. They didn’t move since it was just idling. I didn’t drive it after letting it idle. I will check it the next time I drive it.
     
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  3. Aug 27, 2022 at 6:49 AM
    #513
    N84434

    N84434 In the Frozen Tundra

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    Hopefully this is it. If anything this has been a very good tutorial.
     
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  4. Sep 1, 2022 at 6:13 AM
    #514
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    I dropped it off Tuesday evening at a local shop. I haven’t heard anything from them yet. When I do, I will post here what their diagnosis is. It is still misfiring at idle just like before. So pulling the head and checking the valve lash apparently didn’t do anything but waste my time.
     
    w666 and chunk like this.
  5. Sep 1, 2022 at 7:10 AM
    #515
    hagrid

    hagrid It's called "satire"... look it up.

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    Good Lord, I hope not. Need to save money for fuel.
    Not so. If you did indeed inadvertently play mix-n-match with your shims during the rebuild then re- checking the lash potentially saved you from a burnt exhaust valve 10,000 miles from now.
     
  6. Sep 1, 2022 at 7:59 AM
    #516
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    Well, that is one thing that I know is correct. I made sure the shims were correct for the head.
     
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  7. Sep 1, 2022 at 6:34 PM
    #517
    zgurrola21

    zgurrola21 New Member

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    You either cut a wire up by accident or you have a vacuum leak, either the head gasket, the valve gasket or even the intake man did ok gasket. I have the same codes except for the Igniter and the issue was the intake manifold gasket was leaking
     
    Brynden29 [OP] likes this.
  8. Sep 1, 2022 at 7:56 PM
    #518
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    Did your truck only misfire at idle?

    I did replace the intake manifold gaskets with genuine Toyota brand gaskets.
     
  9. Sep 2, 2022 at 1:46 PM
    #519
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    So the repair shop has had the truck for 3 days. I just drove by and saw it parked on the street. I called them to check on it. They said it was going to take some time to figure it out. They think it is something mechanical. I wonder how long they are going to keep it before giving up.
     
  10. Sep 2, 2022 at 1:53 PM
    #520
    AZTundra

    AZTundra No Longer a New Member

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    Are they charging a flat diagnostic fee?
     
  11. Sep 2, 2022 at 1:54 PM
    #521
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    Honestly, we didn’t even talk about what I will be paying them.
     
  12. Sep 2, 2022 at 3:30 PM
    #522
    chunk

    chunk New Member

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    Yikes, I think it would be a good idea to have that conversation with them, sooner than later. Good for them, and good for you.
     
  13. Sep 6, 2022 at 4:24 PM
    #523
    fighthedude

    fighthedude New Member

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    Update?
     
    Brynden29 [OP] likes this.
  14. Sep 6, 2022 at 4:28 PM
    #524
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    I didn’t get a chance to call. I will try tomorrow. I have not heard from the shop.
     
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  15. Sep 6, 2022 at 6:23 PM
    #525
    Aerindel

    Aerindel New Member

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    They have probably crawled into bed with a bottle of booze crying after trying to solve this one.
     
  16. Sep 7, 2022 at 5:39 AM
    #526
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    I am half expecting a call from them telling me to come get it because they can’t fix it.
     
  17. Sep 8, 2022 at 9:40 AM
    #527
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    I went to the shop to get my sunglasses out of my truck. I asked about the fee for diagnosis. The guy told me it is the shop rate of $95 an hour. And hopefully they can figure it out in that hour… which tells me that they haven’t even looked at my truck yet. It’s been a week.
     
  18. Sep 8, 2022 at 10:12 AM
    #528
    shifty`

    shifty` Push the envelope. Watch it bend.

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    Lame!
     
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  19. Sep 9, 2022 at 12:36 PM
    #529
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    I talked to the shop and they looked at it today. Basically, they don’t know what is wrong. They want to pull the front cover to check the timing, which I know is correct, but they don’t have time right now. I am going to go get it and set up a time to take it back to them. They aren’t going to charge me anything until they figure out what is wrong, so that’s good. But I’m still not any closer to finding out what is wrong.
     
    AZTundra likes this.
  20. Sep 9, 2022 at 1:53 PM
    #530
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    I saw a video online about a guy that has an issue where his camshaft gear rotated because he didn’t put the service bolt in before removing the camshaft. I did not use a service bolt and I removed the camshafts. Could the gear have rotated on me? Does that sound like a thing?
     
  21. Sep 9, 2022 at 3:01 PM
    #531
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    C1A91D64-DFBF-41E9-AC34-27FD2BF7C4BB.jpg

    Ignore the red, I stole this picture. The part in yellow. It appears that the gears can rotate.
     
  22. Sep 9, 2022 at 4:34 PM
    #532
    hagrid

    hagrid It's called "satire"... look it up.

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    Good Lord, I hope not. Need to save money for fuel.
    What you see there is a split gear that's spring loaded. The spring acts upon the thinner section to suck up all the lash so you can't hear the drive and driven gear meshing.

    The ones I've dealt with don't have enough stroke to wind back an entire tooth. Besides, if you had a camshaft indexed incorrectly by one tooth would your engine run as well as it does now? I think it would be shaking around in the engine bay... provided it would idle at all.
     
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  23. Sep 9, 2022 at 6:17 PM
    #533
    huntertn

    huntertn New Member

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    You have already checked about everything I would think to check. You might try going really old school and put a vacuum gauge on it and see what it shows at idle cold and hot.

    I would think it would give you a good indication if the valves are sticking, leaking, etc.

    You might be able to get one through the loan-a-tool program at the local auto parts store.
     
    Brynden29 [OP] likes this.
  24. Sep 12, 2022 at 4:39 PM
    #534
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    I hooked my logger up today and did a few tests. With the car idling in park I get misfires. When I put it in drive, the rpm’s lower and the misfires stop. When under load it doesn’t misfire.

    I don’t have any idea why that would happen. I am going to do an exhaust back pressure test as well as a leak down test. I’ll report back my findings.
     
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  25. Sep 13, 2022 at 12:03 PM
    #535
    dbittle

    dbittle New Member

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    Is it only cylinder #3 at this point and are the fuel trims still different between the two cylinder banks?
     
  26. Sep 13, 2022 at 12:17 PM
    #536
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    It’s all the cylinders. Here are some pics I took:
    55 mph:
    20D8D814-5892-411B-AD91-6A6A666B35AA.jpg

    Stopped at light, in drive:
    DAEFA3ED-5989-44E6-A4D1-9132EB75BE64.jpg

    in park:
    C5BD5794-8E81-4B19-99E6-A00727DE0C4E.jpg
     
  27. Sep 13, 2022 at 12:34 PM
    #537
    hagrid

    hagrid It's called "satire"... look it up.

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    Good Lord, I hope not. Need to save money for fuel.
    You have a sensor/electrical issue.

    NOPE... I take that back. A vacuum leak can still be part of it. Brake booster possibly...
     
  28. Sep 13, 2022 at 5:51 PM
    #538
    Brynden29

    Brynden29 [OP] 2002 Tundra Limited

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    The shop was adamant that it was not electrical. They checked the wiring. They told me it was definitely mechanical.
     
  29. Sep 13, 2022 at 7:16 PM
    #539
    NickB_01TRD

    NickB_01TRD You don't need less cars, just more driveway.

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    Seems pretty easy to test. Pull vacuum line off booster and cap off and see if problem remains.
     
  30. Sep 13, 2022 at 7:17 PM
    #540
    KNABORES

    KNABORES Elitist forum troll

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    Not to be crass, but what do they know? They don't know what is wrong, how can they tell you what isn't? This has been an incredibly frustrating ride for you and I can't imagine. They couldn't possibly have checked the wiring to the degree that they could rule that out completely. Still in the discovery phase unfortunately. I am truly rooting for a solution here.
     
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