LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

what is the idle speed of a 97 z28 m6?

Old 01-26-2005, 11:00 AM
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what is the idle speed of a 97 z28 m6?

im idling at 1100 at warmup then it drops to 900-1000. what is the warm idle speed supposed to be i read in another forum that it is 650? thx
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Old 01-26-2005, 11:05 AM
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Re: what is the idle speed of a 97 z28 m6?

Mine idles about the same as yours which I believe is normal for the M6. The 650 is for the automatics.
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Old 01-26-2005, 11:16 AM
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Re: what is the idle speed of a 97 z28 m6?

The tach isnt 100% accurate. The correct idle while warm is supposed to be around 850RPM. You're idle is fine.
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Old 01-26-2005, 12:47 PM
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Re: what is the idle speed of a 97 z28 m6?

affirmative
mine does prettymuch the same thing
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Old 01-26-2005, 12:51 PM
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Re: what is the idle speed of a 97 z28 m6?

I don't mean to jack the thread, but are the m6's supposed to keep a high idle untill you come to a complete stop? Mine will drop to about 13-1400 when I push in the clutch at crusing speed, then won't drop to normal idle untill I stop completely. Is this normal, I've owned plenty of cars that were sticks before and none did this.
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Old 01-26-2005, 01:06 PM
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Re: what is the idle speed of a 97 z28 m6?

Mine also indicates 1000 rpm at idle.

Even with the clutch disengaged your probably getting some transfer to the engine from the drive train. Never actually noticed if mine does this or not. I'll have to try this on the way home to night.
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Old 01-26-2005, 01:25 PM
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Re: what is the idle speed of a 97 z28 m6?

You car is programmed to idle higher until you hit a certain speed...really really slow! If you are crusing and push in the clutch it should idle around 1200 or so!
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Old 01-26-2005, 01:32 PM
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Re: what is the idle speed of a 97 z28 m6?

Originally Posted by TransAmGT
You car is programmed to idle higher until you hit a certain speed...really really slow! If you are crusing and push in the clutch it should idle around 1200 or so!
Can I program this out? It annoys the living S**T out of me
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Old 01-26-2005, 01:36 PM
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Re: what is the idle speed of a 97 z28 m6?

Originally Posted by dover179
I don't mean to jack the thread, but are the m6's supposed to keep a high idle untill you come to a complete stop? Mine will drop to about 13-1400 when I push in the clutch at crusing speed, then won't drop to normal idle untill I stop completely. Is this normal, I've owned plenty of cars that were sticks before and none did this.
Cool, now I know mine isn't the only one that does this. I assumed it was normal but it sure ain't like the old carburators...throttle closed=idle.
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Old 01-26-2005, 01:40 PM
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Re: what is the idle speed of a 97 z28 m6?

Originally Posted by dover179
Can I program this out? It annoys the living S**T out of me
I wanna say it's there for saftey...it keeps the idle up a little to keep good vaccum pressure for the brakes! But i'm sure you can tune it out! Mine doesn't do it...but there isn't anything on my tune that is stock. So i don't really know what to change!
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Old 01-26-2005, 01:48 PM
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Re: what is the idle speed of a 97 z28 m6?

Do you have any problems with it being tuned out?
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Old 01-27-2005, 01:50 PM
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Re: what is the idle speed of a 97 z28 m6?

Tried this on the way home. Sure enough it sit right on 1500 then slowly drops to 1200 rpm while moving. I don't see why this should bother anyone? It doesn't interfere with the function or drivabililty of the car in anyway. Plus I don't shift slow enough for the engine speed to ever reach idle anyway. Also I'm far more concerned with the top of the tech. not the bottom.
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Old 01-27-2005, 03:05 PM
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Re: what is the idle speed of a 97 z28 m6?

Nope no problems here...i kinda wish it idled up while i was movin but like i said i don't really know what to change in the tune to fix that!
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