PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

New ecm and no start

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Old May 21, 2020 | 09:37 PM
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Default New ecm and no start

Ok. I’ve been fighting a no start issue The last couple weeks after doing a firmware update. Borrowed a new ecm, downloaded the software for it, redid a new tune file for it, did a tps autoset, have tried a new crank and cam sensor car still won’t fire. Prior to these issues the car ran for 3 seasons. Ran 5.40s with a sbe 6.0. Car cranks fine. Tach says sync, then will flash a rpm usually in the 700-900 range which is way higher then it’s actually turning then will say error and keeps repeating that sequence. I’ve replaced everything short of the harness itself. Any thoughts?
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Old May 21, 2020 | 09:43 PM
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tone the crank sensor plug to make sure it's pinned correctly at each end. I havent had a bad engine harness, but they're 2 for 2 with mis-pinned transmission harnesses
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Old May 21, 2020 | 09:47 PM
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The harness is the same One that has been in the car for 3 years now. That’s the only thing I haven’t changed in the last week
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