PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Installed engine now it won’t run

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Old Jun 29, 2024 | 01:08 PM
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Default Installed engine now it won’t run

Have a ls1 in a 97 camaro,was running but with idle issues sometimes on cold start had to give it gas for a minute to stay running.put a rebuilt motor and you have to give it gas to keep it running,it’s dumping gas in the cyl. Black smoke. The motor was broke in on a dyno useing thier fuel computor wireing ect and ran good. My map, maf voltage is good,tuned by MailOrder tuners. Been messing with it for a month.won’t run long enough to get a code, would wash everything by that time anyway.
I’ll recheck my harness connections it’s sliced in which isn’t great the harness is a f- body.
Any way to check cam sensor voltage?
No vaccume leaks, did reuse 500 mile intake gaskets though.

Last edited by 97camer; Jun 29, 2024 at 01:14 PM.
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Old Jun 29, 2024 | 03:14 PM
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It will start and run without the cam sensor, just sometimes on the second hit. The cam sensor's only mission in life is telling the ECM when #1 is on the firing stroke, but the ECM figures that out if cam sensor is DOA or MIA.
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Old Jun 30, 2024 | 12:54 PM
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Do you have a way of data logging it?
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Old Jul 20, 2024 | 10:56 AM
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Got it running found a loose crimp in the pcm power suply wire, cleaned the battery posts,installed new plugs the old ones were black, don’t know what was wrong,it still wants to stall a little on cold idle.I guess you have comb through things,
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