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Thread: LS3 No Start

  1. #1
    Tuner in Training
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    LS3 No Start

    I am having an issues starting a LS3 swapped into a 95 BMW.

    Harness is from PSI. I reprogrammed the PCM.
    Fuel pump is running both when priming and also when cranking. But no fire at all. Not even a sputter.
    When I scan while cranking I do see around 125rpm so that tells me the crank sensor is working.

    I have not checked for spark yet or used a noid to see if the injectors are get a pulse.
    But when I pull a plug I am not smelling fuel at all.

    Fuel pump is running and I have fuel up to the rail. I have not checked pressure yet tho. I need to get a tester.

    In HP Tuners I set VATS 1 and 2 to disable and did a write entire.

    It seems like the injectors are not turning on.

    When I scan DCTs I get
    P0315 - Crankshaft Position System Variation Not Learned

    What can I check next?

  2. #2
    Tuner in Training
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    Also the check engine light is flashing...not solid.

  3. #3
    Senior Tuner SultanHassanMasTuning's Avatar
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    cam sensor readings?
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  4. #4
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    I haven't scanned for that yet.... Should I just add "Cam Sensor Counts" ? Or something else?

  5. #5
    Senior Tuner SultanHassanMasTuning's Avatar
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    yes, counts should def help
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  6. #6
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    scanned the cam sensor and the counts are increasing when cranking.

  7. #7
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    Well it's running. It was the start diag not being disabled.

    Not sure how you embed here on hptuners forum. Here are links

    http://www.youtube.com/embed/Ijf8zhL7dMo

    http://www.youtube.com/watch?v=Yg9htTLEnsI

  8. #8
    Senior Tuner SultanHassanMasTuning's Avatar
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    you should have seen those codes if you scanned when cranking, glad its all working now!
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