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Old Jan 28, 2020 | 08:05 PM
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I have a 2012 Grand Sport with a LS3 engine and in a few weeks it will be waking up from a winters nap my question is, is there a way to crank the engine over without it starting.
I have heard of one way but i'm not really sure of it. Any ideas would be appreciated, Thanks
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Old Jan 28, 2020 | 08:15 PM
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Try putting the gas to the floor. Works for my 2010Grand Sport.
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Old Jan 28, 2020 | 09:13 PM
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^^^ Seriously? Does that kick in some self preservation mode in the ECU making it refuse to start?
Last edited by indyblue67; Jan 28, 2020 at 09:13 PM.
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Old Jan 28, 2020 | 10:24 PM
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It's an OBD2 feature for flooded engines. Works on all cars 96 and newer.
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Old Jan 28, 2020 | 11:02 PM
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Pretty nice to know. I can spin up oil pressure after a long hibernation before starting.

I received the 4 volume manual set for my '12 GS at Christmas and only just started reading them. (talk about some dry reading)
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Old Jan 29, 2020 | 09:04 AM
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that's the way I heard, just hold it to the boards but I thought that was BS. Maybe I'm still stuck in the carberator era
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Old Jan 29, 2020 | 09:17 AM
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OMG! Just start it like normal, with your pinky up in the air.
Last edited by Cockroach; Jan 29, 2020 at 09:22 AM.
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Old Jan 29, 2020 | 10:11 AM
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I don't think there is any advantage to cranking it without firing. It will just put a lot of load on the starter and battery. Idle combustion doesn't create much in the way of loads or engine speed. If anything, it will get oil to the top end sooner than cranking alone. Now if you could build pressure before turning it over or without the compression load (spark plugs removed), that might produce a tiny benefit.
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Old Jan 29, 2020 | 11:55 AM
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Originally Posted by Cockroach
OMG! Just start it like normal, with your pinky up in the air.
thanks roach, never said I was normal
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Old Jan 29, 2020 | 08:44 PM
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Originally Posted by kliph
Try putting the gas to the floor. Works for my 2010Grand Sport.
And only do this for less than 5 seconds.
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Old Jan 29, 2020 | 10:03 PM
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If you want to be certain, simply remove both injector fuses in the underhood fuse block. It was disable the injectors and will not start. When you want to start it, put the injector fuses back in.
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