Just a quick note; I did run my plugs at .038" for a while, and did not get spark blowout until I went up to .040".
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Felt the obligation to post in both threads
Gapped mine last night. I mixed the order, but 2 were gapped at .027 and 2 were at .021. Regapped to ~.035. Can't confirm any improvements so far besides the oddity of a smoother shift from 2nd to 3d (jerking went away)
2012 Cruze LT 1.4L - 9000KM
I regapped mine tonight and did the resonator bypass, so far nothing noticeable to report but it was just a quick trip to the gas station to check my air pressure. We'll see how it does on mileage and in traffic before making any judgement calls.
Mine were as follows, assuming Cylinder 1 is closest to passenger seat and Cylinder 4 is closest to driver seat:
Cylinder 1: 0.026
Cylinder 2: 0.026
Cylinder 3: 0.026
Cylinder 4: 0.025
Regapped to 0.035 across all four.
2014 Genesis Coupe 3.8 R-Spec Hidden Content
2005 SRT4 ACR
2011 Cruze Eco: Gone
You deserve a beer man, if I'm ever in Chicago I'm looking you up.
I didn't disconnect my car battery when I regapped. The car figured it out within a mile or so of driving after I regapped my plugs. The Cruze's ECU has got some really smart software when it comes to how the engine is operating. As a software engineer, I'm impressed at the quality of this car's computer systems.
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2012 ECO MT - Black Granite/Cloth; Hidden Content ; Hidden Content ; OEM Fogs w/Chrome Covers; Hidden Content ; Hidden Content ; Hidden Content
2010 Mit Lancer GT MT (traded for ECO @31K miles)
2002 Pont Montana AWD (traded for 2012 LS @182K miles - title transferred to son on college graduation)
1990 Pont Transport (traded for Montana @240K miles)
1986 Fiero GT MT (traded for Transport - needed more seats)
1985 Fiero 2M4 MT (traded for Fiero GT @8K miles)