Legacy bh5 ej20 non turbo revs power issuem

Discussion in 'Subaru Legacy' started by Scoobylegs, Jul 17, 2019.

  1. Scoobylegs


    Jul 17, 2019
    Likes Received:
    Hi all,

    Having major problems with my legacy. Car runs ok for a few days and then I start it up and it has no power under load and then increases around 2500 and then revs and gearbox step right up to 4000 and up.

    If I hold throttle at 2000rpm its surging and retarding within 100rpm either side of the 2000rpm.

    Temperature guage is fine

    I have replaced new oem airflow meter (maf)
    No codes are coming up when plugged into diagnostics

    Its a gremlin thats driving me mad has anyone had this issue?
    Thank you
    Scoobylegs, Jul 17, 2019
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