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Thread: No spark after engine swap

  1. #1
    Beginner Jarrodtorpy's Avatar
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    No spark after engine swap

    Hi guys,

    So I have recently done an engine swap with my tb42efi, I have just swapped it with another tb42. after months of trying different things I am still stuck with a car that won't start. The engine I had in previously did start, I have only swapped the long motor and kept all the original efi gear.

    Things I have replaced:
    Coil
    Coil lead
    Crank angle sensor
    Dizzy cap
    Dizzy
    Spark plugs
    Leads
    Ignition module

    Things I have checked:
    All relays and fuses
    Power is at all all components, including dizzy and coil

    The car cranks over perfectly, and fuel is getting to the injectors, and I have injector pulse, I literally cannot get spark from the coil.

    I had an auto sparky come out, but he was unable to find the problem either.

    Any ideas from you guys would be appreciated.

    Cheers.

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  3. #2
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    Have you run a scan to find any codes?

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    Take the distributor cap off and confirm the rotor button is turning when the engine is cranking.

  5. #4
    Patrol God mudnut's Avatar
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    If its an auto, check that its in park or neutral properly.
    My advice is: not to follow my advice.

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    Patrol God taslucas's Avatar
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    Could it possibly have an immobiliser?

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  7. #6
    Beginner Jarrodtorpy's Avatar
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    Do not have a scan tool, I may have to get myself one.

    Car is definitely in park

    rotor Botton is turning

    Myself and an auto electrician tried looking for an imobiliser but couldn't find one.

    The car is also dual fuel, not sure if the lpg couldn't be playing some part in this

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    Does your vehicle have the brown plastic box connected to the main wire harness near the ignition coil that has 4 wires going to it?

  9. #8
    Beginner Jarrodtorpy's Avatar
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    Hey mate can't see anything to that description near the coil... would you have a photo of it?

  10. #9
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    Sorry I don’t have a photo.

    Try this then. With a voltmeter measure the voltage on the negative side of the coil.

    1. Ignition on, and
    2. Engine cranking.

  11. #10
    Legendary dom14's Avatar
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    Hmmmm....if an auto sparky can't find the problem, then it sounds like something mechanical, like the dizzy? Just wondering.
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