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Discussion Starter · #1 ·
I just pulled my plugs the other day, to see what they look like, and up the gap to .030. Getting way more power now, and boost has gone up. I bought the car at 18,000 Km's, so it didn't really need touching but I figured I'd look anyways. It surprised me to find that all of the plugs came out at .020 gap, when that's a lot smaller than what even GM specs for the plugs. What happened there?
 

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I just pulled my plugs the other day, to see what they look like, and up the gap to .030. Getting way more power now, and boost has gone up. I bought the car at 18,000 Km's, so it didn't really need touching but I figured I'd look anyways. It surprised me to find that all of the plugs came out at .020 gap, when that's a lot smaller than what even GM specs for the plugs. What happened there?
2011-13 gaps weren't checked and plugs just tost in as is pretty much on assembly.


Wait you are a 2015 the PO or dealer may have done that to you. I had a new coil pack and plugs put in my car they had my gaps not to far from what you had. I ended up swapping plugs and gapping them what you did until I got tuned. gaps went back down to 0.028 then.
 

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For all four plugs to be at 0.020" someone most likely went in and regapped them. While we saw factory gaps all over the place for the 2011s and 2012s we never saw a car with all four plugs gapped low. Invariably it would be just one plug.
 

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Discussion Starter · #4 ·
2011-13 gaps weren't checked and plugs just tost in as is pretty much on assembly.


Wait you are a 2015 the PO or dealer may have done that to you. I had a new coil pack and plugs put in my car they had my gaps not to far from what you had. I ended up swapping plugs and gapping them what you did until I got tuned. gaps went back down to 0.028 then.
Yah, forgot to add that. I'm a 2015
 

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