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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 4:46 AM
    #1
    Trails053

    Trails053 [OP] New Member

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    Hello to all I am a new member I have a 2001 Toyota tundra SR 5TRD package. I noticed it was running very rough going down the road. I was down to about a quarter tank of gas so I decided to stop at a Shell station and fill up the gas tank with quality fuel. I called my mechanic and told him the problems that I was having and said to him that I was going to stop by and hook it up to the scanner to find out what’s wrong. He hook the scanner up and it read the codes PO 302 PO 304 PO 306 PO 308 and PO 300 . Needless to say all four cylinders on the passenger side or not firing. I change the spark plugs in the coil packs, still not firing. The engine starts and runs, but of course, not properly. I was thinking it might be the cam sensor or the crankshaft sensor. You can smell the fuel coming out of the exhaust, But it seems I might have an electrical problem before the coil’s. Half the engine is running what a head scratcher. Any help is deeply appreciated.
     
  2. Mar 31, 2019 at 5:00 AM
    #2
    Rod67

    Rod67 New Member

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    How many miles on it? 5.7?
     
  3. Mar 31, 2019 at 5:30 AM
    #3
    Trails053

    Trails053 [OP] New Member

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    Just turned 100k
     
  4. Mar 31, 2019 at 5:31 AM
    #4
    Trails053

    Trails053 [OP] New Member

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    Sorry..4.7 liter
     
  5. Mar 31, 2019 at 5:48 AM
    #5
    Dmas

    Dmas New Member

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    Swap the coils to the other side to make sure they’re not bad, also check for chewed wires, sometimes rodents shelter inside the engine compartment and start chewing on the wires, have you done any repair or mod lately?, if so, check for loose connections, just some ideas.
     
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  6. Mar 31, 2019 at 6:00 AM
    #6
    Trails053

    Trails053 [OP] New Member

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    I checked the other coils and they’re working fine. The only other repair that I did was the timing belt and that was done by a professional. But no other mods were done to this truck.
     
  7. Mar 31, 2019 at 6:01 AM
    #7
    Trails053

    Trails053 [OP] New Member

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    .. I also checked many wires and vacuum lines to make sure there was no rodent infestation broken or chewed wires.
     
  8. Mar 31, 2019 at 6:04 AM
    #8
    Grey Wolf

    Grey Wolf Alaska Size Stealthy Swift Slate Grey Wolf

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    No 5.7L in 2001.
     
  9. Mar 31, 2019 at 6:06 AM
    #9
    Grey Wolf

    Grey Wolf Alaska Size Stealthy Swift Slate Grey Wolf

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    If all your coils are good then you to need to find out why there is no juice getting to four coils. Do you have a multimeter?
     
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  10. Mar 31, 2019 at 6:10 AM
    #10
    Trails053

    Trails053 [OP] New Member

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    No 4.7 it says so on the engine cover and title. I had it for eight years it had 18,000 miles on it when I purchased it. I always used quality parts and Bosch spark plugs and premium fuel.
     
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  11. Mar 31, 2019 at 6:12 AM
    #11
    Grey Wolf

    Grey Wolf Alaska Size Stealthy Swift Slate Grey Wolf

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    I know. My 07 got the new 5.7L. A multimeter would help you out a lot if you can get your hands on one.
     
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  12. Mar 31, 2019 at 6:14 AM
    #12
    Trails053

    Trails053 [OP] New Member

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    Yes I have a multimeter. I checked the fuses to make sure that they were all good.
    I think it might be a problem before the coil’s.
     
    Last edited: Mar 31, 2019
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  13. Mar 31, 2019 at 6:33 AM
    #13
    Grey Wolf

    Grey Wolf Alaska Size Stealthy Swift Slate Grey Wolf

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    So you are getting juice to the four coils in question? I'm certain some owners of the1st gen who are more familiar than me will chime in.
     
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  14. Mar 31, 2019 at 6:38 AM
    #14
    Trails053

    Trails053 [OP] New Member

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    It sure doesn’t seem so. The plugs were wet when I pulled them out. I just purchased brand new coils And installed them.
     
  15. Mar 31, 2019 at 7:00 AM
    #15
    Dmas

    Dmas New Member

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    So all 8 coils are new? Check for ground connection
     
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  16. Mar 31, 2019 at 7:03 AM
    #16
    Trails053

    Trails053 [OP] New Member

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    Yes. All the coils are new. Where should I check for ground connections? The battery ground is good. Looked around the firewall and the main frame.
    Remember..2001 truck.
     
  17. Mar 31, 2019 at 7:05 AM
    #17
    Dmas

    Dmas New Member

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    Follow the coil wires and you will see them
     
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  18. Mar 31, 2019 at 7:10 AM
    #18
    Trails053

    Trails053 [OP] New Member

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    :thumbsup:
    I’ll keep you posted in the meantime any other suggestions would be appreciated:thumbsup:
     
  19. Mar 31, 2019 at 7:12 AM
    #19
    Rod67

    Rod67 New Member

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    Yup - I knew that (once upon a time)!
    Thanks Wolf

    Curious - What prompted you to replace all the coils?

    A lot of times when things go wrong it is best to go back and check the last thing you changed...
     
    Last edited: Mar 31, 2019
    Trooper2 likes this.
  20. Mar 31, 2019 at 7:22 AM
    #20
    TundraMcGov.

    TundraMcGov. Your friend. Your foe. Not yo Ho.

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    How are the fuses arranged for this engine and the coils? One fuse for the left bank of 4 cylinders? One fuse for the right bank of 4 cylinders? Have you checked that it's not simply a blown fuse?
     
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  21. Mar 31, 2019 at 7:36 AM
    #21
    Professional Hand Model

    Professional Hand Model Fred Brookes

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  22. Mar 31, 2019 at 7:47 AM
    #22
    Professional Hand Model

    Professional Hand Model Fred Brookes

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  23. Mar 31, 2019 at 8:13 AM
    #23
    Trails053

    Trails053 [OP] New Member

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    I change the coil’s because they weren’t firing.( first thing I thought of doing) The last thing that was worked on was the timing belt.
     
  24. Mar 31, 2019 at 8:44 AM
    #24
    Trails053

    Trails053 [OP] New Member

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    I checked all the fuses in the engine compartment I’m trying to upload a picture of the fuse box
     
  25. Mar 31, 2019 at 8:55 AM
    #25
    Trails053

    Trails053 [OP] New Member

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    Fuse box 2001 4.7l
     
  26. Mar 31, 2019 at 9:01 AM
    #26
    Trooper2

    Trooper2 Premium Lone Star Member

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    Can't offer any help other than mentioned.

    FYI, Bosch plugs are not great quality. Better to go with OEM.
     
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  27. Mar 31, 2019 at 9:04 AM
    #27
    ZappBrannigan

    ZappBrannigan New Member

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  28. Mar 31, 2019 at 9:08 AM
    #28
    Trails053

    Trails053 [OP] New Member

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    I hope not.. is there another fusible link between the injector banks if there is such a thing ?
     
  29. Mar 31, 2019 at 9:09 AM
    #29
    saybng

    saybng New Member

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  30. Mar 31, 2019 at 9:36 AM
    #30
    Racingjohndeere55

    Racingjohndeere55 Asst. Pot Stirrer

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    Did it start with the belt replacement? I'm wondering if the belt jumped timing.... just sounds suspect, unless you know for sure its electrical
     

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