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  1. #1
    Newcomer Array
    Join Date
    Sep 2011
    Honda Civic 99

    no vtec with hondata vtec with apexi?

    Hey guys, i have just recently finished a 94 OBD1 b18c2 swap into my 99 ek1 hatch.
    Using an ek4 harness.
    Ive got a p28 chipped with hondata s300 ecu, also using a jumper from OBD2a - OBD1.
    Now car runs fine, ive uploaded the jdm p72 base map on hondata. I get the o2 sensor fault and knock sensor fault. I disable both through hondata.
    But vtec wont engage.
    But when i go to use my apexi power fc ecu vtec engages perfectly fine..
    So i know my wiring is correct..
    Any help would be deeply appreciated.

    Sent from my SM-N950F using Tapatalk

  2. #2
    Green block gangster Array
    Join Date
    May 2004
    twin GX160's
    Check your VTS wiring from A4 of the ECU to the solenoid, ensure you have continuity, make sure the Apexi is not wired into the VTS in any way

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