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Old 04-12-2012, 08:26 AM   #1
TooCool5
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V6 LLT frequent Start (rich) High Idle.

My V6 seems to always go into hi idle cold start mode in stop and go driving around town. I just stop somewhere for 20 min or so, get in the car and it goes to high idle with rich smelling exhaust.
Coolant temp has to be at lease 150 deg. (first line)and it still does this.

Question: Are the rest or you guys seeing this on the V6?
This is getting annoying, did it 5 times yesterday in stop & go around town.

Here is a pic of where my temp gauge will be when it goes into high idle.
Disregard the Cel its not on.
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Last edited by TooCool5; 04-12-2012 at 09:05 AM. Reason: clarity
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Old 04-12-2012, 08:35 AM   #2
KalCorp
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Just some useless information.

I was told “cold start” mode which is actually catalyst fast-heat cycle.

So maybe its the temp of the catalytic converter and not the Eng?
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Old 04-12-2012, 09:02 AM   #3
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Quote:
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Just some useless information.

I was told “cold start” mode which is actually catalyst fast-heat cycle.

So maybe its the temp of the catalytic converter and not the Eng?
This info in very useful, maybe I need to check the readouts of the cats.
Or see the dealer.

Is your V6 LLT also doing this?
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Old 04-12-2012, 09:35 AM   #4
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No. It takes couple of hours for mine to go back into “cold start”
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Old 04-13-2012, 04:19 PM   #5
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Quote:
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No. It takes couple of hours for mine to go back into “cold start”
1/2 hr for me. It goes back into hi idle cold start.
Maybe cause its hotter in FL?
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Last edited by TooCool5; 04-15-2012 at 07:06 PM.
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Old 04-13-2012, 05:57 PM   #6
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DAMN mines never done this or I don't notice it ????
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Old 04-16-2012, 08:37 AM   #7
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DAMN mines never done this or I don't notice it ????
Thanks for the input on my frequent fast idle problem.
Could you just keep an eye on your start up RPM in the next day and let me know for sure if it goes to 1,000 rpm and hangs there for a min in stop and go driving. Or does yours do this just on the initial cold start?
Really don't want to go to the dealer if I don't have to.
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Old 04-27-2012, 02:03 AM   #8
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Mine hits 1000 at cold and then settles down at about 600
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Old 04-27-2012, 10:33 AM   #9
TooCool5
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Going to the dealer this morning to have this checked out as it does it through out
the day in stop and go driving. Sits 1/2 hr then goes to high idle.
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Old 04-27-2012, 04:48 PM   #10
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Dealer scanned the car, called GM Techline and GM says normal operation.
No issues with Camaro idle problems.
It even did it for the tech after sitting in the bay for 1/2 hr, went to high idle
for 15 - 20 sec and held there when he re-started it.
They said they cannot verify another Camaro's normal operation as they do not have any on the lot.
Now I am totally confused, as all you guys said your car did not do this.
Could you guys take a second look for me in stop & go driving. Shut car off and restart 1/2 hr later does it go back into cold start high idle?
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