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P0300 Code Help!!

Jays5ohh

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I recently installed new Brisk Rr12s on my car. Took it to get tuned an on the way got a P0300 code. Tuner said he saw nothing and code went away. Came back and now i can physically here a misfire, mostly around 60-80mph under light acceleration. I did get a P0301 code after a while along with a P0300, and P0316 code. So I swapped over coils, and reset still got P0301 code. Bought new plug for cylinder 1 and still get P0300 code. Plugs don't smell like gas. Ordering a new set of 8 and going to gap them to 28. But any ideas in the mean time. As of now I'm only dealing with P0300 code.
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WildHorse

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You're FI obviously ?
 
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Jays5ohh

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yes, on Nos. Haven't even used it yet because of this issue.
 
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Jays5ohh

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Mod list break down is:
2018 ported manifold
Lu47 injectors
Headers
Pmas cai
E85
100 shot
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