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99 3.4l crank no start no spark

Discussion in '1st Gen. Tacomas (1995-2004)' started by Tayolin, Mar 9, 2025.

  1. Mar 9, 2025 at 3:39 PM
    #1
    Tayolin

    Tayolin [OP] New Member

    Joined:
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    Good Evening TW,

    I've been trying to figure this out and I can't for the life of me figure out what's causing this issue, and I would love some help and guidance to get this sorted. Now, for the story.

    99' 3.4l w/224k, 4x4, extended cab, auto, factory alarm installed, Florida truck it's whole life, moved up to MI back in June (Now in OH as of September) for the ex, and on the way to work at the beginning of January doing about 90mph it just stopped running, hasn't run since.

    I have fuel at the fuel rail (dribbled out when i cracked it open, cranked it and it sprayed fuel everywhere), the timing belt was done at 211k (Belt looks good, doesn't look like I've jumped timing, was able to see that when testing and then replacing the cam sensor), have no spark on all plugs. I looked up stuff here and other forums, which lead me to the cam and crank sensors, along with checking the EFI relay and grounds. Checked the cam sensor, crank sensor, and both grounds on the back of the block and the one next to the battery. Grounds are good, but both sensors gave me fucked up resistance readings while cranking, so I replaced them. Turns out they were OE, so I figured that'd be it. *spoiler warning* It was no the fix. I've checked all the fuses, replaced a couple that had a little green on em, still nothing. Checked relays, they all seem to be working just fine, just don't have any spark.

    I also have replaced the battery before with the factory option alarm and when it's going off it doesn't let it crank at all, so i don't believe it's the alarm. And while checking an replacing fuses I managed to trip it, so it's working as designed.

    I'm at a loss, and the ex needs me out of the house asap to be able to sell said house. Any idea where I should head next to troubleshoot?
     
  2. Mar 9, 2025 at 8:52 PM
    #2
    Glamisman

    Glamisman Well-Known Member

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    You have verified that the camshafts are turning. If the teeth on the cam belt are stripped the crank will turn and that will get the fuel pump to work but if the cams dont turn the ECM will never fire the plugs/injectors because it doesnt get the signal to becuase the ECM doesnt "know" when... if that makes sense.
     
  3. Mar 10, 2025 at 2:54 PM
    #3
    Tayolin

    Tayolin [OP] New Member

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    Can confirm the cams are turning
     

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