2008 Idle Speed

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Oct 14, 2014 | 03:38 AM

gnguru

Thread Starter

Heel & Toe

Joined: Jun 2007

Posts: 21

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2008 Idle Speed

My '08 automatic Vette idles at about 500 RPM stopped in gear. I think it needs to be sped up a pinch to maybe about 700-750 RPM. Can anyone tell me an easy way to do that? Everything in the engine compartment is covered up but I'm sure there's a simple screw adjustment somewhere to do this. Thanks

Oct 14, 2014 | 08:28 AM

dev1360

Burning Brakes

Joined: Jul 2013

Posts: 823

Likes: 7

From: Rosewood Heights IL

No adjustment. It is changed in the tune on the ECU.

If the car is stock, it is set where GM determined it needed to be. Just leave it alone.

Oct 14, 2014 | 10:16 AM

haljensen

Race Director

Joined: Mar 2005

Posts: 10,399

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From: Austin Texas

My '08 A6 idles @ 550RPM in gear, has since new. No higher RPM needed.

Oct 14, 2014 | 10:47 AM

HOXXOH

Race Director

Joined: Sep 2007

Posts: 16,557

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From: Peoria/Phoenix AZ

C6 of Year Finalist (performance mods) 2019

Even though the tach may read somewhere in the 500-550 range, the readout from the ECU at the OBDII port is nearly 100 RPM higher.

Oct 14, 2014 | 11:43 AM

Speedforhire

Melting Slicks

Joined: Mar 2011

Posts: 2,708

Likes: 83

From: Arkansas

LS3 A6 cars "Target Idle Speed" is set at 600rpm P/N and 575rpm in Gear at full operating temp..............and as HOXXOH said it will NOT be accurate at the dash gauge. You would need real time monitoring through the OBD port to get the most accurate reading.

Last edited by Speedforhire; Oct 15, 2014 at 03:37 PM.