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Johan Bard

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  1. Johan Bard

    Rpm problems 2JZ

    Update, I did some measuring and it seemed like there was ignition signal from the link to the ignition box but the reference signal from the ignition box to the stock ecu and rpm meter died when the 'rev limiter' was hit. I tried lowering the dwell time from 3ms to 2.5ms above 6000 rpm and now it hits the real limiter, although when logging the max rpm logged are 7400rpm and the limiter is set to 7600 rpm. And when the engine hits the limiter it don't sound 'smooth' but that's maybe just my imanination. I am using the stock ignition box in my car which is for a 1JZ, should be same for soarers and mk3 supras with 1JZ. Is this a know problem or is there something wrong? I have tried two different ones but with the same part# and they both behave the same. 3ms shouldn't be any problem when running direct ignition like I am from what I know anyway? Thanks
  2. Johan Bard

    Rpm problems 2JZ

    Hey, I checked with my tuner what happened with the AFR when we hit 6700 rpm and he said that the AFR showed lean at the 'limiter'. What does this indicate? I think the injectors were at maybe 70% duty cycle. But the same thing happens when just reving without any load. Thanks a lot for your help!
  3. Johan Bard

    Rpm problems 2JZ

    Hi, I have a link g4 extreme installed in a jzx90 Cresta with 2JZ. To get the car running i used the supra plug in base map and wiering is pritty much the same as for the supra plug in though i am only using MAP sensor. And then I went to my tuner, everything was going pritty well untill we encountered what we belived was missfires at 6700rpm. We tried different coils, closing the spark gapp on the spark plugs with no result at all. It seems to be unable to rev more then 6700 regardless of temperature, load or anything. Even reving it standing still with no gear can't get past 6700. The stop is very rev-limiter-like and always the same. We tried disabling all limits in the link ecu, logs show no limiter has been hit and no fault codes. Can this be caused by me using the supra plug in base map on an extreme ecu? Can this be caused by bad cam or crank sensor signal without it logging any faults? Do anyone have any ideas?
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