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Old 02-16-2016, 11:35 AM   #1
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Join Date: Dec 2014
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I would go back to the plug type you were running. I've had the same issue on another car, went from NGK to Bosch and resulted in power loss. Went back and have always stayed with oem plugs. It's probably a heat range issue. It's not too hard to get to them from below the car. Loosen hold down bolts for coil pack, pull out then replace plugs. If your car is running fine I would pass on Maf clean, different plugs as long as they are firing properly will not show Cels anyways. I really think your mechanic has good intentions but plugs are all different. You noticed a difference and it may be other drivers just never do.
Last edited by Lapister; 02-16-2016 at 11:41 AM.
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Old 02-16-2016, 12:11 PM   #2
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I just went back and checked which plugs I installed in 2014. Got them from Pelican

Bosch Spark Plug - Bosch FGR-6-KQE, (7413), Beru 14 FGR-6 KQU, NGK BKR6EKUB (7969)
Part #: 999-170-207-91-M14




They run great and I have not had any issues with them.
I did not notice any change in power when I swapped out the old ones.
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