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No spark; new igniter, coil & distributor

Discussion in '80-Series Tech' started by Schleiff, Mar 20, 2017.

  1. Schleiff

    Schleiff

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    No spark after replacing coil, igniter and distributor. Have power at the positive on the coil. Cranks hard. Have fuel at the cold start injector. Fuel pump good. Crazy frustrated at this point. Any advice? Thanks.
     
  2. mct75

    mct75

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    What year? Is the check engine light on before you crank it?
     
  3. Schleiff

    Schleiff

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    '91. No check engine light at all.
     
  4. mct75

    mct75

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    If there is no check engine light, the ECU is not powered or in a "ready" state. Check your fusible links. Also, I'd look over the connections to the distributor since you've been messing with it.
     
  5. Schleiff

    Schleiff

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    Appreciate the info. Which fuses/relays should I check for the ECU? Have the original electrical diagram/manual but not near smart enough to follow that.
     
  6. mct75

    mct75

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    @jonheld @LS1FJ40 @Tools R Us

    The fusible links are the 3 funky looking wires coming right off the positive battery terminal, two of them are in a little black box.
     
  7. Schleiff

    Schleiff

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    Got it. Thanks again for all the info.
     
  8. Maleficio

    Maleficio

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    I would spray starting fluid into the intake and see what happens. If it lights off and idles for a few seconds your ignition is good.
     
  9. mct75

    mct75

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    With no CEL the ignition will not even try to fire; the ECU is not powered or ready.
     
  10. Schleiff

    Schleiff

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    So looks like there are two fusible links. On white wire and one black w/blue stripe. Both have 12.5V at the battery and at the fuse box. So are they good I guess?
     
  11. SUMMIT CRUISERS

    SUMMIT CRUISERS SILVER Star

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    pengfinn and LS1FJ40 like this.
  12. LS1FJ40

    LS1FJ40 SILVER Star

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    ^^^ THIS!!

    It has a 99.6% success rate.

    FWIW no CEL guarantees no start.
     
  13. Maleficio

    Maleficio

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  14. LS1FJ40

    LS1FJ40 SILVER Star

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    Save everything @jonheld posts.
     
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  15. Maleficio

    Maleficio

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    Absolutely. Gonna print it and stick it in the glove box.
     
  16. Rifleman

    Rifleman

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  17. Hornd

    Hornd SILVER Star

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    A glovebox should contain:
    EFI Relay (<$10)
    Set of Fusible Links (~$15)
    Cheap Multi-meter
    6' Heavy Jumper Wire (Battery + --> Starter Terminal)
    Printed Instructions below

    If there is no hope:
    Cruiser Flask.jpg
     

    Attached Files:

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  18. jonheld

    jonheld

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    Yes, I am full of half wit.
     
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  19. jonheld

    jonheld

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    There are many similarities, but the ECU is significantly different and there are different names/locations for connectors. Conceptually it is the same. On any 80 Series, if there's no CEL with the key in the ON position before cranking the starter, there will be no spark.
    No CEL=no start.
     
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  20. Schleiff

    Schleiff

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    So I have followed all the different suggestions posted above. Recap = coil, igniter, distributor all good. +12VDC at B+ on connector (understand this means EFI good). Even bought new ECU from Toyota. Just plugged in. Still no CEL and no spark. Flow chart on this post seems to say if all other good, then there is an ECU/wiring problem. Any suggestions on how to test/which wires to test for the ECU? Any other suggestions? Thanks in advance.