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      12-08-2019, 01:54 PM   #10
Jake From State Farm
Uhh... Khakis?
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Drives: 2020 F250 Powerstroke
Join Date: Jun 2018
Location: Phoenix, Arizona

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Quote:
Originally Posted by Tpriest7893 View Post
Yeah I figured I would tune soon, and see how it runs and if it sucks I'll swap them. Did you go with stocks or the smaller gap?
I tried NGK 97506 and several gap sizes (.20, .22, .24, etc.) and had issues with all. My car did not like those plugs and would studder/misfire at high speed under load. It drove me crazy trying to figure out what was going on. Finally I ordered stock Bosch plugs (stock gap) paired with PR coils and it runs perfect.

I know many have luck with the 97506 so i guess it may just depend on the car.
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