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Half the engine is running!!

Discussion in '1st Gen Tundras (2000-2006)' started by Trails053, Mar 31, 2019.

  1. Mar 31, 2019 at 9:44 AM
    #31
    speedtre

    speedtre New Member

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    I thought the same thing if electrical checks out...
     
  2. Mar 31, 2019 at 11:17 AM
    #32
    empty_lord

    empty_lord New Member

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    I don’t know if the 05 has grounds in different spots. But there’s a ground on the front of the motor one each side with a 10mm bolt, I believe it is the ground for each banks injectors and spark plugs, I would pull that and clean it. That ground can cause many ignition problems
     
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  3. Mar 31, 2019 at 11:36 AM
    #33
    Sas

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    Lost track after #1.
    I think Denso is Toyota's tier 1 supplier for spark plugs?
     
  4. Mar 31, 2019 at 12:03 PM
    #34
    empty_lord

    empty_lord New Member

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    Denso or ngk. Denso is what you get when you go to the dealer
     
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  5. Mar 31, 2019 at 12:30 PM
    #35
    Trails053

    Trails053 [OP] New Member

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    No. It didn’t start after the belt was changed. Just driving along and started running bad.
     
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  6. Mar 31, 2019 at 12:30 PM
    #36
    Trails053

    Trails053 [OP] New Member

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    I’ll check this when I get home later and keep you updated.
     
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  7. Mar 31, 2019 at 12:59 PM
    #37
    Darkness

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    How long ago was the timing belt done? How many miles ago?

    I am thinking what Empty Lord is thinking. Seems like the coil packs and plugs are okay but not getting spark. Since it's all 4 on one bank its possibly a communal ground.

    If that isnt it, I would look into the fuel injector wiring to see if they have a similar set up with one ground per bank. Misfire doesn't just mean electrical. If not that either I would suspect maybe the belt jumped on the cam and your valves aren't working in sync with your fuel/spark.
     
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  8. Mar 31, 2019 at 1:39 PM
    #38
    Trails053

    Trails053 [OP] New Member

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    About 3,000 miles ago. I’m going to recheck grounds...
    Grounds are good.
     
    Last edited: Mar 31, 2019
  9. Mar 31, 2019 at 3:23 PM
    #39
    Professional Hand Model

    Professional Hand Model Fred Brookes

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    I went out and checked mine too. There is just one ground on the pass side connecting the engine block backside to the firewall. Couldn’t find another second ground, so assuming there is just one on mine.
     
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  10. Mar 31, 2019 at 3:46 PM
    #40
    Trails053

    Trails053 [OP] New Member

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    I saw that, as well. Good ground.
     
  11. Mar 31, 2019 at 6:13 PM
    #41
    JSM

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    One thing if you have a local Toyota dealer is swing by the service department. Out back where they work on the cars. Walk in like you own the place. Find the first tech and ask who is good with the older 4.7l v8. Explain it to him and get his input. Thank him and slide him $10.

    My guy knows me but name now. He shows me things, explains how to do things and I save lots of $$$.

    I don’t think it’s it timing belt related. It’s going to be electrical in my opinion. I wonder if your crank angle sensor bit the dust.
     
    Last edited: Mar 31, 2019
  12. Mar 31, 2019 at 7:50 PM
    #42
    empty_lord

    empty_lord New Member

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    If he skipped time he’d have a slight tapping sound if it’s more than a tooth. The sound of the valve just barely hitting the piston. Any worse and it would be a horrible racket.
     
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  13. Mar 31, 2019 at 7:51 PM
    #43
    empty_lord

    empty_lord New Member

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    I do believe the 2uz only has one cam sensor so if it died he’d have nothing on both banks
     
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  14. Mar 31, 2019 at 7:57 PM
    #44
    Rod67

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    Baring mechanical failure (like a broken cam, clogged exhaust pipe etc.) a miss is caused by one of 3 things -

    No fuel, or improper fuel air mix.
    Insufficient or nonexistent spark.
    Timing - fuel and spark not arriving at the proper relative time.

    Sounds like fuel isn't the issue.
    I'd pull a plug and see if it sparks when you crank the key. If it does than either spark or cam timing would be the issue.

    Just my 2 cents...
     
    Last edited: Mar 31, 2019
  15. Mar 31, 2019 at 8:01 PM
    #45
    JSM

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    Interesting. This guys was a timing belt slip. I might have missed this but was spark confirmed on the half side of the engine coding or is it just missfiring? Wondering if the OP is thinking missfire means no spark?
     
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  16. Apr 1, 2019 at 4:34 AM
    #46
    zombie

    zombie New Member

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    Those IGNITORS over by your shock tower.....Do you want me to grab the spare out of my truck and show you a picture..................ummmmmmmmmmmm, why do I keep a spare set of these. There are 2, 1 for each half of the engine.
     
  17. Apr 1, 2019 at 5:20 AM
    #47
    Trails053

    Trails053 [OP] New Member

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    No tapping while running.
     
  18. Apr 1, 2019 at 5:29 AM
    #48
    Trails053

    Trails053 [OP] New Member

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    Ya know?.. I never tried to notice if I had spark, checking the spark plug, outside the cylinder using the coil for “hot”....I feel compelled to do so now.
     
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  19. Apr 1, 2019 at 5:35 AM
    #49
    Rod67

    Rod67 New Member

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    Just make sure you ground the plug. Jumper cables will work.
     
  20. Apr 1, 2019 at 5:35 AM
    #50
    Trails053

    Trails053 [OP] New Member

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    EED03C03-5E1D-4CF1-AFD2-82B20109105E.jpg
    I’m still looking for those...post a picture if you could.
    4.7L
     
  21. Apr 1, 2019 at 5:43 AM
    #51
    Rod67

    Rod67 New Member

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    So if you don't have spark try swapping the ignitors while the plug is still out and see if you get spark
     
  22. Apr 1, 2019 at 5:51 AM
    #52
    Trails053

    Trails053 [OP] New Member

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    I took the truck to the mechanic. I’ll post when it’s diagnosed.(hopefully)
    He might have to see this thread...
     
  23. Apr 2, 2019 at 8:49 AM
    #53
    JSM

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    Inquiring minds want to know!
     
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  24. Apr 3, 2019 at 8:08 AM
    #54
    TX-TRD1stGEN

    TX-TRD1stGEN ...

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    Any update??
     
  25. Apr 3, 2019 at 8:35 AM
    #55
    Trails053

    Trails053 [OP] New Member

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    Nothing yet, I will post when diagnosed.
     
  26. Apr 3, 2019 at 9:14 AM
    #56
    Trails053

    Trails053 [OP] New Member

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    I just got off the phone with my mechanic and he said the timing belt jumped.
     
  27. Apr 3, 2019 at 9:42 AM
    #57
    Trooper2

    Trooper2 Texas Size Member

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    Suspects or confirmed? :popcorn:
     
  28. Apr 3, 2019 at 9:54 AM
    #58
    Trails053

    Trails053 [OP] New Member

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    Confirmed...jumped four teeth. Luckily didn’t bend any valves.
    Jumped due to tensioner pully failure.
     
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  29. Apr 3, 2019 at 9:56 AM
    #59
    Trooper2

    Trooper2 Texas Size Member

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    That sucks.

    Recent timing belt change- Not replaced tensioner? or overdue timing belt/tensioner?
     
  30. Apr 3, 2019 at 10:20 AM
    #60
    Trails053

    Trails053 [OP] New Member

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    When the timing belt was changed they changed all the pulleys plus the tensioner. The tensioner failed. There’s a warranty on that tensioner. I asked the mechanic to go to a Toyota dealership to get a tensioner.
     

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