N54 jb4 issues 6 version while the single turbo guys will use the MAC version. I have been running my jb4 for almost 2 years and over 30,000 miles. Often times, under-target boost represents a boost leak. Nov 16, 2016 · I have a question about an N54 in an E92, has anyone had a chain jump a tooth Basically i have a Vehicle recently had a new clutch and Valve stem seals other minor work done. 5PSI: COBB Stage 1 with WOTBox for No-Lift-Shifts, Part 1 . Why wouldn't they? Solve one problem and dive right into another. The timing and average ignition look like freaking garbage, of course. May 10, 2017 · Yo guys heres a list of things im running. Full throttle multiple times and no hiccups. Search. I removed the JB4 reflash the car and now the car was running fine. Nov 18, 2018 · I recently installed my charge pipe and greddy bov on my n54 and after doing so it seems that it won't allow me to hit target boost 14. MHD offers some very cost effective back-end flash maps for the JB4. Then the car would start but shut off shortly after. 2007-2012 BMW N54 Twin Turbo -- The Engine That Started It all! Topics: 12,464 Posts: 172,640 JB4 N54 Hybrid Turbo Setup Directions. Model-Specific Engine Tuning & Modification Discussion. Under full throttle I don't really notice any issues. Collapse Dec 16, 2022 · 2009 E92 335i: M-Performance exhaust, VRSF ***less DP's & upgraded inlets/outlets, Upgraded Turbos Hexon RR600s, VRSF 7. I chose to connect to the Jb4 red power wire. General things we look at when checking logs: Apr 19, 2017 · Piggybacks (Jb4) are typically the best bang for your buck as far as user interface and customizing your specific setup. Sep 2, 2012 · In any map that I've tried (1, 2, and 5) I'm having issues with the boost 'pulsating'. More on this new custom tuning option later. Anything from install directions, to firmware updates, to settings, to frequently asked questions. Hey guys, This is the thread for discussion and details on the new JB4 anti-lag feature. We've been testing the Mac solenoid but don't seem to have any luck activating it. 5psi instead I hear my bov venting out at around 8-9 psi. Most of you will use the 28. It starts but with a really rough idle and goes immediately into limp mode throwing only one code. A few upgrades and proactive maintenance go a long way in transforming the N54 into a reliable powerhouse. On the JB4 it’s showing just 1 PSI. 999% from the N54tuning forum, just with a bit of formatting to it) and figured I'd share it with the community. I've also included the matching N54 ISO JB4 firmware. But I wanted to put a JB4 on it to get the anti-theft benefits, the convenience of being able to change maps on the fly and the safety that the JB4 is famous for. A lot of N54’s already have the updated HPFP’s that don’t often have problems. The wiring is set up correct so it seems as though it's a menu setup issue. My issue is port injection not flowing at all. Oct 5, 2021 · If you're going to run a JB4, don't ever do it without a BEF and if you have to flash anyway, screw adding JB4's mess into it. Oct 3, 2023 · N54 Fuel System Problems. If you are in the market for an N54 powered car, read on to learn more In my personal opinion and experience, a flash tune is the way to go and solves a ton of problems. I printed it out and it's now in my glovebox whenever I need it! Car: BMW 135i 2008 N54 Mods: Pure stage 2 turbos VRSF Inlets BMS DCI VRSF ***** without CC Berk Street catback Jb4 G5 + Jb4 mobile. I'll see how everything looks in a day or After rough start up with codes 29DC and 29F2, high fuel pressure is a constant 2 on JB4 when driving (2 converts to 300 psi). Bimmerpost ☰ Model Selection. Over the years, a range of problems have surfaced, leading to a mixed reputation among owners and potential buyers. Also I'd recheck your diverter valve/BOV setup Atlantic Blue 335i E92 N54 RWD AT, JB4, MHD, FSB, 21 psi. The back-end flash shifts the timing, VANOS, and fueling to the flash side while the JB4 retains its more accurate boost control, in-dash gauges, E85 autotuning, and various Are these jb4 default or stock ECU default settings? How are these settings compared to non jb4 n54 and which settings will yield functioning of the wastegates similar to stock ECU ? I tried the above jb4 default setings and I disliked it. But for some reason, it seems like with the JB4 installed, the HPFP controll won't work like it should. If you are not a tuner then ignore this thread. we've found the following: - Both solenoid connectors have a constant 12v feed to one wire. JB4 BEF issues. Sometime the problem was bad enough to throw one or two cylinder misfire codes. sorted out so I need advice on extra fuel. This my third start of the morning Wirelessly connect the JB4 to your Bluetooth 4. 5 months. Aug 15, 2020 · Depending on how much E85 you’re running, you will likely max out around 550whp before needing port injection. The JB4 firmware you are using (32/12//2) is for a twin turbo setup. I put one on my 3. 5psi, 94 pump gas + 50/50 meth, V4 autotune): JB4 18. Nov 7, 2022 · This is the central point of contact for all N54 JB4 related information. Also, the Dinan SW has really come down in price. Any and all relevant info is linked in this post. Advanced Search Red goes to ECU green connector or to Jb4 power wire. I dont think it was related to the jb4. On the Jb4 i can see that that the eth content is roughly the same as the fuel it app. I've used the same laptop (dedicated netbook used only for the car) on my E90 pre-JB4 as well as another non-jb4 E92 with no problems. Apr 28, 2015 · BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > N54 HPFP and LPFP - what to look for in your logs May 2, 2019 · With default setting JB4 uses internal settings for fuel control. Tuners and "shade tree" tuners who like to evaluate their logs and tinker may find this information useful. In jb4 i activated bit one and 2. bit2 - Turn on to disable JB4 hot/cold water & oil temperature protection bit3 - Turn on enable IAT/timing spoofing, requires wire added to JB4 harness and 6cyl setting for spoofing level bit4 - Unassigned bit5 - Unassigned Mar 27, 2023 · So I just installed the 6266 and everything is hooked up msc solenoid and all boost like are good no leaks but I’m on the ST BEF and on map 1 which is suppose to be wastegate is overboosting to 22psi I have the 1 bar tmap but what settings in the jb4 do I need to setup for the single setup it’s pulls strong but don’t want it overboosting Jul 23, 2016 · Hey everyone, I always seem to have trouble finding the full breakdown of the JB4 menus so I put together a little cheat sheet (99. But if I give it a little gas, it will indefinitely start the the misfire again and throw the code (within that 2800 RPM range). I'm having a few issues with the JB4 g5 / Mac solenoid. The car runs fine with no apparent or obvious performance issues. Some people have both the JB4 and MHD running but I can not speak to the benefits there. My hope, though I knew it wouldn't be as strong, was that the JB4 could come close enough to the custom tune that I could live with it. Collapse Search in titles only Search in Support & Log Review only. Despite these N54 common problems, the engine is renowned for its robust construction and incredible tuning ability. The JB4 boost over safety feature however seems to be switching the car from Map 2 to Map 4 when doing heavy pulls. The work was performed Using correct locking tools and BMW Procedures etc now a few odd things occurred. I went the Active Autowerke for my 340 (to be different), but I like the JB4 for the smooth WOT shifts. 29F2: High pressure pump / open loop set Apr 1, 2024 · Hello, I buy a jb4 kit for my n54 from ebay, i installed this on my car, everything works correctly except for the settings on the steering wheel, the application connected via bluetooth works without problems, I can make logs or see live values, but I cannot access the menu on the steering wheel. F40Model Year: 2019 + Previous Generations; F20 / F21Model Year: 2012 - 2018. Mar 4, 2024 · The Upside: The N54’s Saving Grace. 5 sensor but i'm already N54 cold start issues Post Reply Thread Tools 11-15-2014, 12:17 PM JB4 installed but haven't had it on any tunes in 1. 5 Bar TMAP, BMS dual OCC's, BMS cowl delete filters & DCI's, Index 12 Nov 21, 2022 · 4) Monitors current through the injectors and sends a signal back to the JB4 altering it of various problems including a clogged or disconnected injector, blown electrical fuse, loose ground, etc. May be speaking too soon though. The olny problem ive had is my electronic wastegate actuator went bad. Then there are the fuel injectors. Test driving the car with the jb4, it felt great and I had no issues. Jan 10, 2019 · The reality is the JB4 has been on the turbo BMW engines for 12+ years now. bin) looks like the correct back end flash for MHD/JB4 but your JB4 firmware is not correct for single turbo. That’s worst case and doesn’t seem too likely based on the fact all 6 cylinders are misfiring. a noticable power gain ,but its not as smooth as stock. Sep 1, 2015 · 2007-2012 BMW N54 Twin Turbo -- The Engine That Started It all! For firmware updates if having issues we suggest you turn off WiFi, change upload timeout to 25, and set your phone next to JB4 box under the hood. Note that you will need to update your DUTY BIAS column to all either all 50s or all 0s to avoid effecting your base duty cycle. 1. N54 / JB4 High RPM Issues. In the jb4 app i see Map 1 is titled 91+, 2 93+, 5 autotune , 7 e30 - e85 etc. I currently have my JB4 set to map2 and option 4. Right now I want to get the fuel pump, etc. 0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable. N54. Though after the car warms up and is turned off and on, the high fuel pressure goes between 4-11 (600-1,650 psi) with regular driving, and between 8-14 (1,200-2,100 psi) when WOT. Until 3000/3500 is like the wastegates are confused and don't know what position to take. Not sure why you were having sporadic boost issues with the JB4. 3 Series (N54) E90 E91 E92 E93 M3 3 Series (N55) E90 E91 E92 E93 M3 So your JB4 back end flash through MHD (JB4_I8A0S_ST_E85__PI_TS. White to pin 15 on jb4 Db25 connector. May 30, 2017 · A lot of folks here use the JB4 with little to no issues. Does anyone know whats wrong. However, as per Terry I only had to put the white signal wire into DME 16 to get things going. If JB4 was left on 4/2 with no BEF, it probably made it worse. Purple to pin 21 jb4 grey subconnector - counted from the female side. Sep 20, 2021 · N54 / JB4 High RPM Issues. Of course because I had a jb4,,I was able to diagnose problem immediatly. Much of this is a non-issue in the modern days. An N54 that already has index 11 or 12 (12 in a perfect world) is a This thread is to discuss the basics of the new JB4 v28. Yesterday, 05: And yes, my car was a BEAST with it. I'm a little leery about doing any coding on cars with the JB4 in case the data gets jumbled while the laptop is doing the actual coding. 8+ "duty bias" tuning parameters, and general adjustment of the JB4's boost control PID system. 4 to allow for flash only operation. Black goes to ground - make sure this cable has a, solid ground. Latest firmware installed BMS Backend flash , pump file Fuel it stage 2 LPFP Forge diverter valves BMS Catch can Jb4 2 step relay I just installed the Jb4 2 Step relay (without antilag). This feature allows you to pull 25 degrees of timing on the fly using either the volume button on your steering wheel or brake pedal to spool up the turbos before starting a race. Frequently asked questions regarding N54 common problems, N54 stock turbos, N54 horsepower limits, N54 maintenance and more. I bought this jb4 used so the previous owner may have something messed up in the settings. According to the hijacked boost gauge I am peaking at around 14psi average, but intermittently pulsating between 14psi and around 8psi. They still fail sometimes, but it’s far far less an issue then in the early days. While it delivered impressive performance, it was not without its issues. However, N54’s on old OEM turbochargers with frequent under-target boost may suggest the turbos are simply tired. Beyond my knowledge. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more Jun 15, 2017 · The cons of the JB4 may be irrelevant as back-end flash tunes coupled with the JB4 solve these issues. E81 / E82 Could a short circuit in the jb4 due to loose or dirty connection cause these issues? A lot of the codes dont even exist in the list for the n55 and the ones that do exist for the e92 n55 are for waterpump and battery voltage which after checking seem to be running fine. Has anyone else seen this problem? Oct 14, 2022 · I recently installed the JB4 in my car. by inline6xi. I have over 100k on car ,and wastegate actuator problem 2007-2012 BMW N54 Twin Turbo -- The Engine That Started It all! Topics: 12,382 Posts: 172,162 Last Post: Second hand JB4 Apr 25, 2024 · Use this thread for discussing the MHD N54 flashing tools, logs, XDF files, BINs, etc! What is a back end flash map? For those who prefer flash tunes but want to keep the benefits of JB4 functionality and features just add in a back end flash map. The problem always went away eventually, and I rarely experienced performance issues, especially if let the car run for a bit before driving. Yellow to pin 9 on jb4 usb cable Db9. Understanding these problems is crucial for anyone considering a vehicle equipped with the N54 engine. 09' N54 335I Alpine White w/Coral Red Interior and Brushed Aluminum Trim/Sport Premium Package/Comfort Access/6 AT Steptronic/JB4 G5/BMS DCI/AR 3" Downpipes with Race CAT/ER Charge Pipe with Synapse BOV/2nd CAT Delete/M Tech Front Lip/M3 Rear Lip Spoiler Regardless of its problems, the N54 is still an incredibly tuner friendly engine, and given that it was used in cars from 2006 to 2016, they can be had for relatively cheap. On the other hand, due to their age, many of the common problems they experience may be exacerbated. I think for the N54 its about $600, so almost on par with JB4 but a lot more than MDH. Everything seems like it works because i can use the different setting but I do not get any boost in any of the maps. Watergate actuator solenoid diaphragms tear sometimes causing boost issues. Jan 16, 2025 · However, the N54’s popularity came with a caveat. 2013 e93 335is n54 jb4 issues. If they had issues, I doubt they'd still be selling them. Support & Log Review. Flex Fuel, JB4+PI Controller Issues. Mar 4, 2018 · For what it's worth, with the JB4, I can clear the misfire fault on the fly and the engine will go back to running smooth, no longer misfiring. Download firmware using the new JB4 Mobile firmware database or externally by clicking this link. The car (335i N54) is currently at a garage getting a single turbo kit installed. MHD Pump BEF solved the lean issues. Nonetheless, our ultimate recommendation is running the JB4 stacked with an MHD back-end The differences between a JB4 vs flash tune and JB4 vs racechip explained in depth. Couldn't control the JB4 with steering wheel control either or log on the JB4 with the phone app. 0L Audi engine and insanely happy with it (it's been 3 months now). I was constantly put in map 4 and a bunch of posts later on n54 tech and I could never get it solved. Apr 15, 2018 · I agree with most of the review. Here is a quick reference to the JB4 N54 logging parameters and their general meaning as of ISO v31 firmware. Jan 4, 2022 · I already found a cheap used JB4 Port Injection controller (since I already have the JB4). Also take a look at MHD which is cheaper. I had a Jb4 on my 2014 335i before going with BM3 and the entire time I was chasing down lean codes, rich codes, AFR codes, etc. 5) Monitors fuel trims in each bank and failsafes in the event of a mismatch of more than 15% indicating a potential boost single cylinder boost leak Dec 14, 2019 · BMW N54 FAQ's. See full list on bmwtuning. E81 / E82 May 30, 2023 · A message popped on my JB4 app (see attached), code 2ABD appeared, and engine stop running. Sep 28, 2023 · Hello, Here is a brief description of my config Hybrid Turbos TTE500 (change because the old one was an issue with wastegate Flappers) BMS DCI, Charge Pipe with Tial, BOV Vaccum Adapter FMIC 5" from ARM Silicon Inlet and ******* ******** Of course, i use BMS JB4 For the moment i can use my TMAP3. Jb4/mhd stack, Full Fuelit system, bms jb4 pi controller. 5" FMIC, aluminum Charge Pipe; Forged aluminum Diverter Valves w upgraded Yellow Springs, Walbro 450 LPFP, Spec Stage 3+ clutch w SMFW, Custom welded RB external PVC w ported & polished heads from Motiv, 3. I would like to point out that Aug 24, 2011 · Last dynos on STOCK N54 turbos (401whp 445wtq, 18. So then I took the jb4 out and had boost again but when i installed it again no boost. co Aug 19, 2021 · To check if the problem is just present with the JB4 installed, i threw it out and tested again with flash only and there my rail pressure is very stable, even when running more boost. I plan to find a tuner and will be using custom MHD flashes from that tuner. For example during a rolling race get close to the starting Sep 1, 2021 · More frequently, the N54 will see issues with boost under-target. May 9, 2024 · Some have issues with OE ignition coils at that power and opt for Precision Racewerks coil packs. Note that while many of these parameters are also present in other JB4 applications such as N20, N55, and S55 they may or may not retain the same meaning/use. It at least used to be that JB4 ran the higher of it's target or DME target, which sucks when the DME cuts boost to save your bacon and JB4 says, what? In the summer, I would occasionally get a rough idle on a cold start up. Order the full N54 JB4 system here. I am using the hybrid fuel it flex fuel pi BEF. 615wtq is a lot to push through an N54 on stock frame turbos so you could have internal issues. Piggybacks can ‘annoy’ the factory automatic Trans (or DCT) computer because of the underrated load values being sent to the TCU. Seems as if the JB4 simply couldn't flow enough fuel to support inlets/outlets and a 20% E85 mix. Dec 3, 2022 · So I changed my HPFP and it ran nice and smooth for a couple weeks I would say but out of no where my pressure for the high side dropped out of no where. Only issue with the car running was a rough idle at times, presumably from carbon buildup as a blasting hadnt been done recently. Also, there really isn’t a better tune to start with on the N54 than a JB4. If you come across something missing from here be sure to let us know. spqm ergpm xjeap trj kyuqg tqv liidxoes spcot vcalty ptak