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Corder Corder is offline
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Default Possible overboost or Jb4 setting error??? - 05-19-2022, 08:34 AM

I have the jb4 and a vrsf dp and that's all really worth mentioning. Sometimes while under full throttle a large jerk/ lock up for a second. This is followed by the two flashing lights and my dashboard does the sweeping feature like it has restarted. This does not however push the car to map 4 like most post I have read it will allow me to recreate the same problem back to back if I wanted to. I have taken several logs but when this happens, the device freezes the app and it will no longer work. Have been dealing with this for a long time and have read multiple thread of issues but have found little to help me with my issue. The issue happens much more frequently when in the higher boost maps like 2 and 5. Also the lower I have the ff/wastegate adaptation the more prevalent the problem is. Even though it doesn't push it to map 4 I believe it has something to do with a overboosting issue because I am getting that in the system warnings. I have just been dealing with this because it is easy to avoid it happening but when it happens it seems like it could be doing some serious damage to the transmission because of how hard it will lock up while under a load. But thanks if anyone can help I have logs just don't know how to post them here. Hope this covers it what I am dealing with well enough for someone to give me a starting point. I also could just be really bad at this and made a big mistake. Thanks in advance! I added the logs but not sure if I took them right. Some of the values on the logs are different than the normal values I use, was just seeing if those changed the outcome and no still the same issue( the fuel loop and pid gain were a bit lower some values I read on a thread) The log of map 5 however does have the normal values.
Attached Files
File Type: csv P5_M4_R1_220517_2304.csv (89.9 KB, 18 views)
File Type: csv P5_M0_R4_220519_1118.csv (83.8 KB, 21 views)
File Type: csv P5_M5_R2_220515_1155.csv (47.0 KB, 22 views)

Last edited by Corder; 05-19-2022 at 09:42 PM.. Reason: Added the logs
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RVA_N55_Fan RVA_N55_Fan is offline
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Default 05-19-2022, 07:35 PM

Map 4 log is the only one they might read...logs are third gear pulls...that said, how old are your plugs?


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Default 05-19-2022, 09:18 PM

Quote:
Originally Posted by RVA_N55_Fan
Map 4 log is the only one they might read...logs are third gear pulls...that said, how old are your plugs?
The plugs and coils are relatively new done around 90,000 miles and I'm at 102k. Thank you for the info too I tried to do the pulls in 3rd but guess I did it wrong lol.
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Default 05-20-2022, 09:46 AM

Took some more logs, the order is 5,4,0. For some reason it grouped all of the runs together even though they were in different maps, I'm a noob.
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File Type: csv P5_M5_R3_220520_1126.csv (24.4 KB, 20 views)
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Terry @ BMS Terry @ BMS is offline
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Default 05-20-2022, 02:46 PM

Boost seems to be following target fine in the last log. It could be a CANbus issue. Load v19 alpha firmware in the app, do another log, and email it to me terry@burgertuning.com
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