cant pass the smoke test

STEV0

New Member
my CO are reli high and ive changed my cat and lambda sensor, my modifactions are induction kit, 4-2-1 header, high flow cat, and a cat back exhaust, i got no engine management light up, dont seem to running ruff or anything, checked for air leaks cant seem to find any, it dont use oil, can any one help at all
 


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