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No spark 3.4

Discussion in 'New Members' started by Plugg, Jul 16, 2010.

  1. Jul 16, 2010 at 2:37 PM
    #1
    Plugg

    #1
    Plugg [OP] Member

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    I have a 97 Tacoma and did a motor swap (both 3.4) and now i have no spark after doing the change. The truck ran fine before...i checked for voltage at the coil packs (key on) and nothing there. I have went over all the conesctors and everything looks good. Motor turns over fine but nothing. Where to from here
     
    Plugg, Jul 16, 2010
    #1
  2. Jul 16, 2010 at 2:42 PM
    #2
    chris4x4

    #2
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    FlimFlubberJAM
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    Welcome to TW!

    Have you checked the crank shaft position sensor?
     
    chris4x4, Jul 16, 2010
    #2
  3. Jul 16, 2010 at 2:43 PM
    #3
    Plugg

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    Plugg [OP] Member

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    Yes changed it out with a spare,,,
     
    Plugg, Jul 16, 2010
    #3
  4. Jul 16, 2010 at 2:49 PM
    #4
    chris4x4

    #4
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    Is your timing correct?
     
    chris4x4, Jul 16, 2010
    #4
  5. Jul 16, 2010 at 2:51 PM
    #5
    Plugg

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    Plugg [OP] Member

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    Yes new belt and the works...shouldnt i have some voltage at the connector at the coil packs with the key on?
     
    Plugg, Jul 16, 2010
    #5
  6. Jul 16, 2010 at 2:53 PM
    #6
    chris4x4

    #6
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    Yes. Check your grpounds.
     
    chris4x4, Jul 16, 2010
    #6
  7. Jul 16, 2010 at 2:58 PM
    #7
    Plugg

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    Plugg [OP] Member

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    Checked the grounds and to be on the safe side replaced 1 of them. I only know of 2 one is from back of engine to firewall(replaced) the other is from battery to fender
     
    Plugg, Jul 16, 2010
    #7
  8. Jul 16, 2010 at 3:01 PM
    #8
    chris4x4

    #8
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    2019 Rubicon 4 Door,
    4.10 gears, sliders, and lots of buttons.
    If the engine has no spark, check for voltage at the coil positive terminal when the ignition key is on.
    If there is voltage, the problem is on the trigger side of the coil (pickup, crank sensor, ignition module or primary wiring circuit).
    If there is NO voltage at the coil, the problem is on the supply side (the ignition switch or ignition wiring circuit).
    If the coil has voltage, the problem may be a bad high voltage output wire from the coil to the distributor, hairline cracks in the coil output tower, or cracks or carbon tracks inside the distributor cap or on the rotor.
     
    chris4x4, Jul 16, 2010
    #8

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