Jzs171/1JZ vvti issues

Thread in 'Technical Questions' started by k.lee244, Feb 28, 2024.

  1. k.lee244

    k.lee244 New Member

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    Recently imported a crown JZS171 to Canada, long story short it revs terrible when its cold (won't rev or misfires with a bit of a loudish bang at very low rpms) after it has idled for a bit it revs fine. Driving it is where problems continue, it wont rev past 3k rpm under load unless downshifted into 1st and pushed through the 5k range. It builds a max of 0.5 bar before just falling flat on its face in the 3k to 5k rpm range.

    I have replaced plugs (bkr6e) and got some good condition OEM coilpacks + wires (after I noticed one coilpack was slightly burnt under on the spring with white residue under the blue rubber part) all of which have made the car run similarly bad.

    I'm a bit lost on what the issue might be.

    Crown JZS171, 4 A/T, stock apart from FMIC and Boost gauge

    Cheers
     

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