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DR_EviL

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Posts posted by DR_EviL

  1. Stepper motor idle control on 2JZ startup rpm spike

    in G4+

    Posted

    10 hours ago, cj said:

    Can you do a log of this happening + post your map? it sounds like you are exceeding one of the parameters that needs to be met to let one of the idle systems kick in.  Maybe ignition idle control never kicks in and your timing values in the main igntition table are too high for the revs to drop.

     

    Thanks

    This is open loop on the icv and the ignition timing.

    It only started after the customer did some wiring in the bay. it only did it twice then went back to normal.

  2. Stepper motor idle control on 2JZ startup rpm spike

    in G4+

    Posted

    On ‎7‎/‎12‎/‎2019 at 9:16 AM, Adamw said:

    Can you do another log with the start up step set to zero.  For some reason in that log there is a whole chuck of data missing, it jumps straight from 200RPM to 1800RPM.  Also a copy of your tune would be helpful.

    Thanks

    With the step at 0 it struggled to start, now set at 25 tapering down to 18 when hot.

    This solved the issue for a few days. Now on the first cold start of the day the idle sticks 1000rpm above my open loop target throughout the whole warmup, a key cycle cures the problem.

  4. Stepper motor idle control on 2JZ startup rpm spike

    in G4+

    Posted

    The car arrived with increasing numbers in the base position table at higher temperatures, a bigger number makes a lower idle.

    I have never had a car where bigger numbers made lower idle but i'm not familiar with stepper motors, most things I tune have pwm valves or nothing at all.

    This seemed wrong to me, but the help file says, "If you find that increasing the number in the idle base position table causes the idle to increase then the stepper motor is wired in reverse"
     

  7. Spark testing and weak output

    in G4+

    Posted

    6 hours ago, Simon said:

    To confirm if an igniter is needed measure between the 12V feed and the signal in, If its low around 1 ohm then an igniter is needed.

     

    I get 0.4 ohms

    Thanks for your help, I will fit a set of coils with built in ignitors.

  9. Spark testing and weak output

    in G4+

    Posted

    16 minutes ago, Richard Hill said:

    Yes it is possible to spark without an igniter. I even had a car which actually just ran  (barely) without an ignition amplifier. 

     

    That is what this car is doing, it runs but very badly.

  10. Spark testing and weak output

    in G4+

    Posted

    So it's actually possible to get a spark out of the coil even though it doesn't have a built in ignitor?

    I'm not 100% sure, I didn't build or wire this one, it just came in for tuning. I hate it when they arrive on a tow truck!

    Just wired in a R8 coil I had laying about for testing and the spark is very strong.

  11. Spark testing and weak output

    in G4+

    Posted

    Hi

    I have a car in for tuning that runs very badly, at first I thought it was a trigger issue due to the cam and crank signals being at the same time. While swapping trigger edge for the cam I noticed the spark is so weak that I cannot get my timing light to trigger.

    Coils are BOSCH 0221504006.

    Testing the coil outputs in the software I have sparks that will barely jump a 2/3mm gap, Is this normal for the test mode or should I see full power?

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