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What would cause a lean mixture?
Ok, before I install my new t-belt it was running at around 11.2 but after I change my t-belt, it seem to be running at around 12.3 during WOT. I don't think it's the timing belt causing that.
First thing before timing belt is turbo upgrade.
Second is timing belt change.
Third is I couldn't find a cone filter so I bought K&N filter and just cover up the MAF adapter.
Would one of those event cause the lean mixture?
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Tomei ARMS/HKS 272s/HKS SMF Intake/ARP HStud/Mil.Spec/PTE880/Megan O2/Buschur Mani/3"TBE/Walbro/Hallman/Injen Intake Pipe/3"FMIC/Synchronic BOV/WORKS XC8
EvolNinja
Tuned by 4WS Tuning
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