JB4tech.com - International Turbo Tuning Discussion
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TrapHouse TrapHouse is offline
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Posts: 19
Join Date: Jul 2019
Car: Z4 sDrive35i
Default Problems after installing turbos - 03-26-2021, 06:41 PM

Recently installed 17Tís
I replaced the thermostat, water pump & HPFP
Also installed stage 2 LPFP
PR coils and 2 step colder plugs were installed around 1k miles ago
Car fired up the first time fine and was running fine. Did some runs and wasnít hitting target. Went into limp mode and threw a check engine light.
CDA6 , 2E83 codes
I deleted codes and restarted the car. It started with a very rough idle and would stall if I didnít give it gas. The fan was also on full blast. And it Threw more codes - 2B2C and 29dc

Z4 35i running Jb4 and e85 pi hybrid BEF

Attached a short log
Attached Files
File Type: csv 20210325_222543_runs(1).csv (18.6 KB, 79 views)
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TrapHouse TrapHouse is offline
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Posts: 19
Join Date: Jul 2019
Car: Z4 sDrive35i
Default 03-27-2021, 08:32 AM

Attached log of cold start. Looks like HPFP is shot even though it’s brand new?
LPFP stays pinned at 84 because z4 has no sensor

Anybody? Should I swap my old HPFP back in?

EDIT** found a crushed vacuum line but I’ve replaced it and same problem. I believe it to be a JB4 setting issue? I followed the hybrid turbo setup exactly. I was messing around with FOL lowered it from 40-30 and the fan quieted down for a few seconds and then went right back to full blast. Car is still in limp mode with 29F2 and 2AAE shadow codes read via MHD. I don’t have any codes read through JB4 mobile.
Attached Files
File Type: csv 20210327_112545_runs(1).csv (49.0 KB, 75 views)

Last edited by TrapHouse; 03-27-2021 at 10:05 AM.. Reason: Update
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