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Jan 28, 2020 | 08:05 PM

Kingdog44

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Intermediate

Joined: Nov 2017

Posts: 29

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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

Jan 28, 2020 | 08:15 PM

kliph

Racer

Joined: Jul 2010

Posts: 351

Likes: 16

From: Lockport NY

Try putting the gas to the floor. Works for my 2010Grand Sport.

Jan 28, 2020 | 09:13 PM

indyblue67

Racer

Joined: Sep 2019

Posts: 488

Likes: 207

From: Indy `O=o-

2020 C6 of the Year Finalist - Unmodified

^^^ 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.

Jan 28, 2020 | 10:24 PM

FAUEE

Race Director

Joined: Oct 2012

Posts: 17,459

Likes: 6,563

From: Melbourne, FL

It's an OBD2 feature for flooded engines. Works on all cars 96 and newer.

Jan 28, 2020 | 11:02 PM

indyblue67

Racer

Joined: Sep 2019

Posts: 488

Likes: 207

From: Indy `O=o-

2020 C6 of the Year Finalist - Unmodified

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)

Jan 29, 2020 | 09:04 AM

Kingdog44

Thread Starter

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Joined: Nov 2017

Posts: 29

Likes: 4

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

Jan 29, 2020 | 09:17 AM

Cockroach

Burning Brakes

Joined: Feb 2017

Posts: 942

Likes: 172

OMG! Just start it like normal, with your pinky up in the air.

Last edited by Cockroach; Jan 29, 2020 at 09:22 AM.

Jan 29, 2020 | 10:11 AM

dr_gallup

Safety Car

Joined: Feb 2016

Posts: 4,486

Likes: 1,410

From: SC

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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Jan 29, 2020 | 11:55 AM

Kingdog44

Thread Starter

Intermediate

Joined: Nov 2017

Posts: 29

Likes: 4

Quote:

Originally Posted by Cockroach

OMG! Just start it like normal, with your pinky up in the air.

thanks roach, never said I was normal

Jan 29, 2020 | 08:44 PM

#10

kliph

Racer

Joined: Jul 2010

Posts: 351

Likes: 16

From: Lockport NY

Quote:

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.

Jan 29, 2020 | 10:03 PM

#11

joshp14

Instructor

Joined: Aug 2005

Posts: 110

Likes: 41

From: Iowa

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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