N54Tech.com - International Turbo Racing Discussion
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gimmefunk gimmefunk is offline
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Car: 2017 c300
Default Terry Please Help! What am i doing wrong? - 06-13-2020, 01:05 AM

**SOLVED! ****

CHECKING RAINBOW HARNESS WITH VOLTMETER I FOUND RED WIRE WAS BROKEN BUT STILL IN SHRINK.. RESOLDERED GOOD TO GO!

Sorry I have never posted to any forum before but i need advice/help!!

C300, installed jb4 with only rainbow ribbon, with bluetooth. I have included the very first logs, as well as the very last logs. There just is NO BOOST when jb4 is installed. doesnt matter which map. In fact, i kept getting p0237 code, which meant Turbocharger/Supercharger Boost Sensor 'A' Circuit Low.

After going back and forth, flashing the different firmwares, etc. I gave up and ordered a new TMAP. It arrived and the turbo without the jb4 would work. I would get through the ODBII -0.7 readings until i would boost and it would jump as high as 2.0 . Then back to -0.7. but at least the boost worked.

After i installed JB4 and map1 then 2, there was no boost and without the JB4 the car is back to sluggish. Is my JB4 broken somehow? Please advise

Also at first boost2 did have values but that disappeared. now neither boost or boost2 have any values and the AIF(?) goes nuts up and down irratically

Last edited by gimmefunk; 06-28-2020 at 11:59 PM.. Reason: forgot
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gimmefunk gimmefunk is offline
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Car: 2017 c300
Default Logs - 06-13-2020, 01:13 AM

oops forgot logs!
Attached Files
File Type: csv 2019-12-28 14_34_53_Map-2.csv (59.2 KB, 36 views)
File Type: csv 2019-12-28 17_07_56_Map-2.csv (2.8 KB, 35 views)
File Type: csv 2019-12-28 18_25_37_Map-2.csv (3.7 KB, 36 views)
File Type: csv 2019-12-28 18_30_11_Map-2.csv (2.7 KB, 34 views)
File Type: csv P23_M0_R1_200612_153707.csv (2.7 KB, 36 views)
File Type: csv P23_M0_R1_200612_153716.csv (2.8 KB, 34 views)
File Type: csv P23_M0_R1_200612_153926.csv (3.0 KB, 36 views)
File Type: csv P23_M0_R1_200612_154001.csv (2.6 KB, 32 views)
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VipinLJ VipinLJ is offline
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Join Date: Feb 2020
Car: G20 330i, F25 X3, B9 SQ5, C7.5 A7
Default 06-13-2020, 02:15 PM

Are all the plugs plugged in tight? When I first installed mine on my 330i, one of the plugs was loose though it looked tight. Car had no boost at all. It even threw an error code. Rechecked connections, tightened it and everything was back to normal.


Current:
2020 BMW 330i xDrive
2018 Audi SQ5 Prestige
2017 Audi A7 Prestige
2016 BMW X3 xDrive28i
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