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Just thought I would let everyone know just in case. Check the plug gap before installing new plugs. I bought 4 new AC Delco plugs for my 2014 1.4L that were supposed to be pre-gapped at 0.028 They were not! All of them were wrong ranging from 0.022 to 0.024

A simple $1.50 tool was all I needed to confirm it and fix it.

Furthermore when I removed the stock plugs from the factory (car has 39800 miles) the gap was wrong as well. The car is running much better with the plugs gaped correctly. I wonder if the assembly line just slammed them in there without caring
You can't expect plugs to be gapped correctly after 40,ooo miles. Electrodes wear down. Gaps get wider.

It's called wear and tear.
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