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I have a D17A2 VTEC with idle issues I Replaced PCV and collapsed hose, replaced IACV, Replaced, VTEC solenoid, replaced all Hoses, new throttle body, New EGR, And still have idle surge. I do have a cracked exhaust manifold but am replacing tomorrow 2/2/2025 with long tube manifold I have for the civic. Just don’t know what to do. Have snap on computer and the codes it pushes is the two things I replaced P0505 and P1505. Also have a P1298 code now after replacing all parts and hoses. Any other ideas?
