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Engine Idle Smoothness Question

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Old May 11, 2015 | 11:38 AM
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Default Engine Idle Smoothness Question

Should I expect as normal an occasional roughness (minor) during idle as the nature of the beast or should it be completely steady as she goes similar to my non-Vette daily drivers? Within the last year I have replaced fuel filter, plugs and wires, battery and had throttle body cleaned. I also use Techron every other tank full. If this is not normal what may be potential areas in need of attention? Thanks for any advice!

Last edited by VettesGoneWild; May 11, 2015 at 12:41 PM.
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Old May 11, 2015 | 11:50 AM
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I would like to know as well. I know my Vette has a slight roughness too it. I have new plugs, wires, cleaned the MAF and TB and use seafoam on the top end.
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Old May 11, 2015 | 12:45 PM
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My '01 idles rough for a few seconds when first started cold, but is smooth as silk after that.
Diagnostics may be able to change idle mixture Don't know.
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Old May 11, 2015 | 12:53 PM
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04 6spd 33k Vararam B2 TI exhaust... Idles a little rough intermittently, nothing consistent about it... just seems to on occasion take drink or inhale something it doesn't care for and shivers... then smooths back out.
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Old May 11, 2015 | 02:59 PM
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04Z, idles pretty rough full time, no complaints.
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Old May 11, 2015 | 04:06 PM
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My '03 idles smoooooth! Sometimes after some spirited driving it idles rough but soon smooth out.
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Old May 11, 2015 | 04:47 PM
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99 coupe with 59,000 idles between rough and smooth if that makes any sense ????????????? just know I don't lose sleep over it !!!!!!
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Old May 11, 2015 | 05:24 PM
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Mine did the same up until I replaced both forward O2 sensors...idles smooth as silk
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Old May 11, 2015 | 05:26 PM
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Originally Posted by SG Lou
Mine did the same up until I replaced both forward O2 sensors...idles smooth as silk
Mine are new, no change !!!!!
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Old May 11, 2015 | 07:09 PM
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mine idles smooth with a slight cough now and again, also if I stare closely at the rpm gauge it fluctuates within about 100 rpm +/- on start ups.

Id say , based on everything else ive seen on the vette, that this is normal.

This is not a highly refined , highly engineered car, and all of this goes with the territory.

Nothing to worry about in my opinion.
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Old May 11, 2015 | 07:10 PM
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Originally Posted by 1Willy1
mine idles smooth with a slight cough now and again, also if I stare closely at the rpm gauge it fluctuates within about 100 rpm +/- on start ups.

Id say , based on everything else ive seen on the vette, that this is normal.

This is not a highly refined , highly engineered car, and all of this goes with the territory.

Nothing to worry about in my opinion.
It was supposed to be. GMs best effort.
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Old May 11, 2015 | 07:41 PM
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I notice a slight rough idle when sitting at the drive thru at the bank on my 97, new plugs and wires, 95k miles
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Old May 11, 2015 | 09:17 PM
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I have had three C5s and each one has had a slight roughness at idle. IMO, it is just the nature of the beast.
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Old May 11, 2015 | 09:26 PM
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Just put a cam in it and then you will be happy,,,,, Oh ya man I have a cam in it dude !!!!!!!!!!!!!!!
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Old May 11, 2015 | 09:47 PM
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My '04 idles a little rough. Purrs like a pussycat when she's in gear. She's obviously much happier in motion than sitting still. So am I, so we're a good match.
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Old May 11, 2015 | 09:50 PM
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My 04 Z idles a bit rough but I like it, it's as if she ready to take off running. ������
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