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Rough idle

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Old Dec 29, 2024 | 02:03 PM
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  #21  
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donbrew
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Joined: 01-23-2009
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From: Fredericksburg,VA
Any chance it is the AC compressor clutch?
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Old Dec 29, 2024 | 03:39 PM
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Gearhead1
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From: Alabama
Originally Posted by donbrew
Any chance it is the AC compressor clutch?
I dont know but I can turn the A/C on and the idle smooths out. I’m guessing the ECM changes something for increased load but rpm stays about 800, just smooth
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Old Dec 29, 2024 | 05:57 PM
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From: Alabama
Mileage on my spark plugs have little over 100,000 miles on them. So, probably need to change them. Wondering if the gap is way more than the .043 they should be….that lot miles.
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Old Dec 30, 2024 | 05:36 AM
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The gap doesn’t open up much, I do change them every 100,000 as recommended. Torque them to 15 ft lbs.
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Old Dec 30, 2024 | 06:43 AM
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firemangeorge
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Isn’t the gap .040 for the 2011 ?
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Old Dec 30, 2024 | 07:20 AM
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No , the AC Delco 41-103 iridium plugs are pre gapped to .043 , other manufacturers come at .040 but aren’t correct.
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Old Dec 30, 2024 | 07:48 AM
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firemangeorge
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Hmm. My 2010 Owners Manual says .040. So it was changed for 2011 ?
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Old Dec 30, 2024 | 08:02 AM
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PulpFriction
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Originally Posted by firemangeorge
Hmm. My 2010 Owners Manual says .040. So it was changed for 2011 ?
No.

2008 & 2011 say .040”.

The difference is trivial.

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Old Dec 30, 2024 | 08:17 AM
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Oldblue
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I’ve had the .043 gap in both my 2007 LS 2.2 and my 2011 2LT 2.4 and there was no difference.
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