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Uneven idle
Thread Starter
Racer
Joined: Dec 2002
Posts: 289
Likes: 0
From: The wrong side of the Atlantic ocean
Uneven idle
I guys,
I've tried a 2001 C5 yesterday, the car is very nice, clean and meets all my expectation regarding the C5 that I'm looking for.
The only annoying stuff about this car is the uneven idle. It fells like the engine misfires at idle, it's not shon on the RPM gauge but you can feel it, and the owner told me that the spark plugs need to be changed (which he's gonna do before I'd buy the car), the car has 42000 miles.
Do you ever experienced the same and what do you think?
Thanks for your info
Greg
I've tried a 2001 C5 yesterday, the car is very nice, clean and meets all my expectation regarding the C5 that I'm looking for.
The only annoying stuff about this car is the uneven idle. It fells like the engine misfires at idle, it's not shon on the RPM gauge but you can feel it, and the owner told me that the spark plugs need to be changed (which he's gonna do before I'd buy the car), the car has 42000 miles.
Do you ever experienced the same and what do you think?
Thanks for your info
Greg
Le Mans Master
Joined: Jan 2007
Posts: 7,364
Likes: 6
From: Rocky Mount Virginia
You will hear many answers to this. Plugs are good to 75000+ miles, but changing them wouldn't hurt. The LS1 motors will have the idle shudder to it. Many here will chime in with that. Drive it with the windows up, no radio and a smooth road if possible(a hill would be best). If it is misfiring you'll feel it. I think it is the notorious shudder. Nothing to worry about.
Melting Slicks
Joined: Aug 2006
Posts: 2,866
Likes: 45
From: Tampa Bay, Go BUCS!!!Go Rays!!!Go Lightning!!!
St. Jude Donor '12-'13-'14
You will hear many answers to this. Plugs are good to 75000+ miles, but changing them wouldn't hurt. The LS1 motors will have the idle shudder to it. Many here will chime in with that. Drive it with the windows up, no radio and a smooth road if possible(a hill would be best). If it is misfiring you'll feel it. I think it is the notorious shudder. Nothing to worry about.
Let them change the plugs and test drive it again.
Did you notice if there is any rhythm to the "roughness"? It is possible there is a small cam in there.
Thread Starter
Racer
Joined: Dec 2002
Posts: 289
Likes: 0
From: The wrong side of the Atlantic ocean
Safety Car
Joined: Apr 2007
Posts: 3,640
Likes: 83
From: . New York
Ok, check one problem off the list 
I just noticed this yesterday, a very small roughness when ideling. Didn't remember it being there before. Drives/performs fine.
Didn't know this was common with the LS1.
Thanks
I just noticed this yesterday, a very small roughness when ideling. Didn't remember it being there before. Drives/performs fine.
Didn't know this was common with the LS1.
Thanks
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Race Director
Joined: Mar 2007
Posts: 16,154
Likes: 0
From: Kali
St. Jude Donor '11
These engines idle a bit rough... by that I mean you can feel the engine runing as opposed to most other modern cars. I asked the same question when I first joined. I chalked it up to "they all do that".
If your idle is jumping up and down and there are noises that are not supposed to be there you have other problems at hand.
If your idle is jumping up and down and there are noises that are not supposed to be there you have other problems at hand.
