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Post by silly1 on Nov 14, 2019 16:33:56 GMT
Hi hoping someone can interpret logs (attached). Any help/guidance will be appreciated the issue I am having is that I am getting hesitation and am not sure how to read the OBDELEVEN chart to troubleshoot the issue. When it happens, you can see the rev counter jumps and feel the car hesitate for a split second. Thanks Attachments:Chat20191114-1.xlsx (519.34 KB)
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Post by Matthew on Nov 28, 2019 1:43:58 GMT
I see your car makes 11 psi of boost peak, so you don't have a boost leak if you have a stock K03 turbo.
What I want to see is your fuel pump settings for the HPFP, and wastegate duty cycle readings (requested vs actual)
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Post by silly1 on Dec 3, 2019 7:23:50 GMT
Hi Car is stock. N75 and pipes replaced few days ago due to split hose. No change as hesitation still occurs. I could not find n75 duty cycle under live data/charts. Is it called something else or am I looking in the wrong place? I have done some logs for new N75 + fuel. Hopefully the fuel logs are what you were requesting. Thanks for the help. Attachments:Log AM_v1.xlsx (262.03 KB)
Log PM.xlsx (856.24 KB)
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Post by Matthew on Dec 4, 2019 0:27:16 GMT
Booo Your morning log seems to show that your car is over boosting (sligtly). This seems fine in my opinion. I would like to see your accelerator pedal position values. My issue is that I don't want to use vehicle speed in the same manner as engine RPM, so I like seeing the log as a dyno pull in a single gear. Can you use this link below to see if it seems more plausible? www.goapr.com/support/datalogging.php
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Post by Matthew on Dec 4, 2019 0:30:27 GMT
Your N75 is at group 114, block 4.
It should never exceed 80% (fully-floored), or else it means you have a boost leak that the N75 is trying to compensate for.
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Post by silly1 on Dec 18, 2019 18:17:13 GMT
apologies for the delay. I have communicated with developers as N75 duty cycle doesn't appear on my UDS list (attached is a list of UDS options available for my CAXA engine ) I am not 100% sure but I think "Charge press. ctrl. spec. value %" is the N75 duty cycle on my car. I only managed to get the attached 2 short logs done. Hope it helps. As soon as I get a chance I will try to get more logs thanks
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Post by Matthew on Dec 18, 2019 22:56:07 GMT
Looking at chart20191217.xlsx (33.77 KB) I don't see where the accelerator pedal is fully floored beyond 68%, so I can't comment on max boost here, but it is observed that there is a mechanical delay in the turbo actually providing the requested boost. This looks normal in my opinion.
Looking at chart20191218.xlsx, I see where you mean business with the 80% accelerator pedal. Again, the results seem the same here. I wouldn't worry about your turbo as it is indeed delivering. I suggest you do a throttle body adaptation, and also recalibrate the kick-down feature of your accelerator pedal for good measure.
Here on this forum, we need to start standardizing single gear pulls such as 4th gear from about 2,000 RPM to redline on a flat unobstructed road or test track. Your pedal movements stayed at 14% then skipped over 32% before going to 47%. That isn't consistent for a fair single gear pull and may indicate a "dirty" accelerator pedal connector (such as a bad potentiometer). 6-speed transmissions are done in 4th (1:1) and 7 speed in 5th (1:1).
You only do lower gears if you only have a short road / test-track. The accelerator should be floored just to the point of the kickdown until the vehicle gains speed and will not do an automatic downshift, then fully fllored at that point to redline. You can feel the kickdown switch with enough practice. All testing is done with all traction control options disabled (if equiped).
So far, your car seems fine in my opinion. I'd suggest you check your fuel pressures. Fully floored, your pedal should be showing at least 90% per OBD2 standards. Check its range of motion with the engine OFF, ignition ON in OBDeleven.
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Post by Matthew on Dec 18, 2019 22:58:47 GMT
Somewhere, I'm supposed to say no speeding on public roads and observe all local laws. Keep all diagnostic testing to the confines of a closed testing facility such as a drag-strip.
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Post by silly1 on Jan 24, 2020 14:11:11 GMT
I’ve not had luck with throttle body alignment. All I get is function not available.
saw another poster on a different thread mention about live adaptation then do a throttle reset. Unfortunately, I have not found steps to match that comment
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Post by Matthew on Jan 25, 2020 0:52:09 GMT
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