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Without thinking about the tune. Usually a lean condition could relate to air leaking into the engine. Either intake, after maf or intake manifold gasket(doubt it). My grandmas corolla had a lean condition and it was the intake manifold gasket being cracked. Not sure I'm even on the right track but just a reference.
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GTX2867R, moto-tuned , tomei op , motiv fp , Invidia Q300 ti , Rota titan 17x9 +42 , nt555 255/40 , ST coilovers w/cascam , Hotchkis sways
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