How to tune ms41 ECUs (BMW m52/s52 engines): basics

[@b.1z966]

If I was in Finland right now...ahh man....i would buy you a beer and a big steak :) Great video, and not just this one, all of them. Your knowledge is superb. Greetings from Serbia.

[@kristjan100]

I agree, greetings from Estonia. I've never even owned a car but I like what I see here. Lots of BMW love in Estonia.

[@Mjongtyre]

Wow, just wow. We appreciate your videos! This channel right here gives so much explanation about bmw's we mostly do our racing in baltics and helps putting more power into them. Giving DIY guys chance to do more with less money. Thanks alot!!

[@WLguitarist]

Thanks guys! This information is exactly what I needed. Once again thanks! :)

[@palbertto]

Thanks for all King PAZI! Greetigns from Portugal !

[@minimoke8394]

What a fantastic video. Hats off to people like you.

[@antonkrylov22]

great job! Thank you from Kazakhstan! English subtitles save me life ;)

[@daveb2205]

Thank You! sooo much great info. I have been trying to work out how to do this for a while but couldn't work out what the deal was with my Australian delivered hardware - then I stumbled across your videos, and here is all the knowledge I need!! Very much appreciated :D

[@pazi88]

You are welcome! For more information, search trough the ms41-section on RRforum and the ms41 wiki. And If you find all this useful consider donating to people who have made all this possible.

[@nolimits44BF3]

this is so good please keep these kind of videos coming. i live in Australia and am English speaking but have been watching your videos for sometime now. the subtitles help a ton but you also explain things so well :D

[@pazi88]

Thanks! I will keep them coming.

[@nononanonon]

Very valuable info. Thank you so much!

[@NyxNick]

Dear sipa thank for your videos and bmw education! cheers from Mauritius Island

[@pazi88]

Thanks a lot!

[@ciomagteodor2150]

You are doing a really great work and helping a lot of people you are going to get intro car enthusiast haven :))

[@pazi88]

Ciomag Teodor Thanks a lot!

[@bikehubjapan]

Thank you! Great video as always. I will join the romraider forum and see if someone has anything already made for M52B25!

[@pazi88]

There is not much tuned files available. And you will get better results by doing the tune by yourself. Stay tuned and I will later show how.

[@bikehubjapan]

OK buddy. Thanks. I shall wait for your next excellent video

[@TheKingie07]

Great video thanks. I'm doing an m52tub28 swap into a 99 e46 318i sedan and interesting in mild tuning to increase rev limiter. Thanks from New Zealand.

[@pazi88]

For the ms42 what is in m52tu you will need this bit more expensive flash tool for that: chipster.no/index.php?_route_=Software/Siemens-MSS5x-Flash-Tool-MS41-MS42-MS43-MSS50-MSS52-MSS54 and you also need to convert the ms42 to use different software version if yours is wrong. Check wiki: www.ms43wiki.com/index.php?title=MS42

[@MrNYUNDERCOVER]

thank you for responding. ...I'll be in touch

[@crankshaft6666]

Nice video (as usual), thumbs up! As said often, avideo about fitting the E34 rear axle in the E30 would be very interesting, I'm sure I'm not the only one who's interrested in ;)

[@_coffeeandcigars]

is the swap for big power builds (big diff case)?

[@crankshaft6666]

Guess most people want it because of five lug and bigger brakes, but it's also meant to be able to handle more power

[@pazi88]

Ra Du Hopefully I have enough time in some point at least show how it looks done. I'm probaply not going to do another swap like that :D

[@pazi88]

654879 5469684 Yes. We still have the medium typ188 case. But typ 210 is bolt on case now. We made the swap because at the time we didn't find proper e30 rear axle to start with.

[@olegplanets]

Great walk-through! Would be awesome if you did video on SAP delete

[@BlueeeXBL]

Hey that round obd adapter with the switch to enable write acess) were can i find it? the link to it is dead..

[@MrNYUNDERCOVER]

try to modify the obd2 connector, the same way you did, but both of the obd2 connectors that I have are wired the same... you said to jump #14 and #18 on the obd2 connector, I missing something? can you please explain? where did you get your obd2 connector or do I need to rewire the obd2 connector?

[@ggrrmmi]

Thanks for sharing your knowlegde !! Very good video !!

[@xyoungyx]

hi pazzi just done all this to be able to switch off ews on a bmw i have just supercharged the flashtool says looking for cable and cant get it to work vagkkl 409.1 cable any help would be appreciated 🧐

[@pazi88]

You have wrong type cable. It needs to have OBD2 cable with FTDI chipset inside. Not all obd cables have it.

[@xyoungyx]

thanks pazzi i thought the same so i ordered the silver cable with bmw inpa cd.this will work for me now?

[@pazi88]

@@xyoungyx It should. Most of those have the genuine FTDI chip.

[@foreignsonly746]

thanks alot @pazzi88 garret turbo m52tub28 e46 is coming along here in Canada

[@tuningpartsperformance2901]

Can you make a video how to tune ms41 that shoots backfire catless

[@SuperJoeTendo]

I swapped my 97 e36 US m52 from auto to manual. What settings do I have to change or download to get the check engine light off and driver properly?

[@pazi88]

The missing auto should not trigger check engine light. Check fault codes what it's complaining about. If it's really only complaining about missing auto, you need to ews sync the ecu to ews unit from manual car, to make the ecu manual too.

[@DkingE39]

amazing video I can't wait to start my Frankenstein E39 project tuning stock ecu. I estimate ill get to about 850ft lbs of tq @ 5k rpm

[@pazi88]

DkingE39 You will need quite big maf for that kind of engine. What are you planning to use?

[@DkingE39]

pazi88 planing on using the Porsche one I forgot the exact one it's suppose to be a 3.5 in diameter

[@DkingE39]

pazi88 also do you know the max length to rethread head bolts on m52 iron block

[@mateos3607]

hi there....i have a question please...my car was a e36 320i m50 and i swap the engine for a m52b28....everythink works good...my problem is i can not read anything when i put the plug for reading problems and codes....what can it be the problem...i have done a remap and the tuner had to make everything and see everythink only direct from the ecu pluged to hes computer because he could not come in from this obd plug ....

[@tangomanwx]

Hi I have done the same engine swap Into my 1994 320i, but am only running with 320 ecu. How did you bypass your ews on the 328 ecu,did you buy an eprom? My donor was a 1996 328 Help appreciated John Irl

[@mateos3607]

@@tangomanwx my friend i change the hole engine wire i buy it from 328i And plug in the 328i ECU... Then i send the ECU to an expert to bypass some codes So that i Can run the car with my key...

[@graczek234g7]

hello i don't know if you can read this so many years after, but i have strange problem, i did it like you showed it, partial readed- no problem. when i was trying to write it, it stops on 8%-says it's done, checksums corrected and car won't start. readed ecu again and the maps are not correct, still have the connection to the ecu, looks like the program has problem or the wiring right? i wan't to add i have done one ms 42 with no problems

[@pazi88]

Just try writing again untill it's succesfull

[@graczek234g7]

I was trying 5 or more times and once it stopped 8%, next 5%, other one 2%. Strange thing, earlier i have ordered kess so i am waiting for it. And have hope kess will write it with no problem

[@ajl0426]

Can flashing be done from inside the car via the ODB2 port if a switch is wired into the data link's 14&18 pins?

[@oscararnesen699]

Hey Pazi quick question. After doing a partial write of the original file, the pops and bang and 7.000 rev limiter is not on. The write goes by the book and finishes 100%. What could the problem be? MS41.0 523i 1996 401

[@driftbeam8624]

can i tune an ecu with index from m52b20 take this ecu wire on m52b25 head with m50 block that there is m54b30 internals and s52 cams n/a tuning will it work?

[@peterm3861]

Hey pazi, first I have to thank you a thousand times for sharing your knowledge and experiences! Your videos are extremely informative and helpful! Whenever I build my own turbo Bmw, I will mention you in some video! I haven't had the time yet to watch all of your videos but I will have to, there is nothing more interesting. But I already know some stuff about the different M5x engines and turbocharging them. But since you are the one with the experiences... I want to build an E36 turbo. I plan on using as many OEM non-M parts as possible to keep it as low budget and fun as possible. I thought about 450-500hp on 102oct pump gas since we don't have E85 anymore in Germany. What do you think would be the engine to go with whilst keeping as many parts stock as possible? M50B25nv, M52B28 or maybe M54B30? Looking at stock internals, DME, head gasket and maybe possibility to lower CR like milling the pistons for example. What do you think of maybe M54B25/B30 or M52B28TU which is similar to M54? I think downside of M54 would be rods. But boost limited to maybe 100Nm per rod should be ok, shouldn't it? And I've read that M54 has factory MLS headgasket. Also dual Vanos and good DME. M54B30 has some problems with weak piston rings and fewer cooling passages in block due to ULEV emissions stuff, but M52B28TU would be the easiest solution for around 450-500hp and around 600Nm, what do you think? How is valvetrain, pistons, rods and headgasket in comparison to M50nv and M52? Could I keep stock camshafts and make them fit for turbocharging via Vanos setup? Thanks a lot!

[@slavtcoa6856]

Mit 102 schafft der m50 schon die 450-500ps komplett Serie (ZKD nicht haltbar). Am m52 und 54 sind die Pleuel schwächer, da kannst du aber mit China Teilen arbeiten z.B. maxpeedingrods sehr gut bis auf kolbenbolzen die man ggf minimal nachonen sollte

[@NathansGarage]

Thank you for this great video. I'm learning so much my head is exploding right now :) I actually just want to turn things in the ECU "off" ABS, DSC, airbags, downstream O2 sensor etc. I have a 2000 Z3 2.8 in the USA. I assume that's in the "Control Bits" at the top of the list?

[@Dracuz123]

This is about tuning the ecu (engine control unit) - no such thing as disabling ABS, DSC and airbags in that because they are not engine related. There are separate control units for that which communicate with the ecu. The easy way out of this is just pulling the related fuses, but that will result in a christmas tree on the dash.

[@stuffdoggg]

My 2000 z3 has obd2 port is inside cab in console on passengers side, what cable will I need for flashing.

[@pazi88]

The obd2 cable that I have linked in description for example. And the quick flash software.

[@pazi88]

But wait. Yours is probaply m52tu. It has ms42. Check ms4x wiki for more info about that. Same cable still works.

[@stuffdoggg]

pazi88 thanks , I plan to do a s52 swap eventually currently rebuilding one out of a 1998 m3 but it’s single vanos... the 2000 z3’s m52tu are dual vanos? I have 2 z3 cars, a 2000 2.3 (2.5) and a 2.8. Also will the software be able to delete EWS?

[@ukkomies100]

I am trying to make my pre excisting m52b25 ecu run the stroked and tuned m52b28 thats under the bonnet now. My original plan was to. Partial read and partial flash my friends 528 ecu into mine but noticed that his was id 41 and mine id 59 so my ecu has much less maps available. Can i still do this or will it brick the shit

[@pazi88]

Nope you can't. It will brick it. Id59 (-373) isn't very good anyways. Update it with -861 full read and tune it.

[@ukkomies100]

@@pazi88 so can i write the full dump of -861 (id 41 i assume) straight onto it or how can it be updated other than changing the entire physical DME. And wouldnt that then affect the ews?

[@pazi88]

@@ukkomies100 yes with chipsters ms41 flash tool or ms41 flaah tool. Both can do the update. EWS still works

[@ukkomies100]

@@pazi88 thanks🤟

[@ukkomies100]

Just one more thing. Does the file name affect anything. I guess the VIN number is hardcoded even beyond the full flash if the EWS still works. Or does that need to be changed in hex code to match

[@101088kaka]

I cant get the new quickflash software to work, the buttons is just grey, im using a galletto cable and obd adapter where pin14 and 18 is bridged. Any guesses on whats wrong?

[@pazi88]

101088kaka Galetto cable doesn't work. You need to have obd2 cable with ftdi chip inside. For example one that I linked in description.

[@101088kaka]

pazi88 what About the mpps v13?

[@pazi88]

101088kaka No idea. And who cares, because those cables with ftdi chip can be get for even few dollars.

[@101088kaka]

Its Because I need One right now and i Know somebody who got mpps cable😁

[@MrNYUNDERCOVER]

ok, so there is a place on romraider, that says properties and open that? correct and just look for byte 8. what should I change it too? that would turns off the ews or deletes it?

[@pazi88]

Yeah where the properties normally are in windows. if you change the byte 8 correctly, it will turn off EWS.

[@MrNYUNDERCOVER]

Was wondering if I can turn off the EWS... if yes. can you tell me how? I have downloaded everything I need,but couldn't find ews....can you please help. ... Thankyou

[@pazi88]

MICHAEL MALDONADO Check the properties for byte 8.

[@mistermasterx5913]

Pazi, I already have DCAN INPA cable, Do I still have to jam jamper pin 14 to pin 18 for read and write to my dme ?? ,,

[@Dracuz123]

I suggest opening it and seeing if the pins are already connected. There should be a wire bridging the two pins.

[@mathieutajan2790]

Hello for the socket 20 pin you have inverted pins 14 and 18 or you only connect the wire of pine 14 on pin 18 thanks

[@pazi88]

There is jumper wire between pin 14 and 18.

[@mathieutajan2790]

pazi88 Ok so if I understand well I made a bridge between pine 14 and pine 18 and I add a button on off the bridge wire thank you

[@pazi88]

mathieu tajan Yes that's right.

[@mathieutajan2790]

pazi88 thank you very much

[@tuzemens_cars]

Hi, What is “Engine Speeed Limiter (Resume Delay)” ?? What effect does it have on rev limiter and how to adjust it? I have read the romraider table description but I couldn’t understand. Thanks.

[@jerrynaslund3368]

The link for quickflash does not work.

[@MrNYUNDERCOVER]

ok, even though my #14 has a black wire, I have to jump it to #18? correct? I can put a on and off switch between #14 and #18 and that should do the trick...

[@pazi88]

He colors can be anything in those Chinese adapters. Yes you can put switch between those.

[@oldman66]

Thank you for the information. I remap ms41 to support 7k rev and I encountered a problem that the engine can rev to 7k stay in idle but when I running on the road and every time I push rev over 6k then the engine check light on and into the limp mode . Do you know how to solve the problem. Much appreciated. This car was AT to MT swapped.

[@Ezrvdu]

Can you use this software to read CEL (check engine light) codes?

[@pazi88]

The tool that you need for flashing can do that: bmwtuningtools.gumroad.com/l/ms41quickflash

[@GaragE36uk]

excellent video, I see in your comments about ews delete but I can't seem to find any option to do this, could you help?

[@AppieGTTI]

Bro what kind of cable do you use I have also kkl vag cable but cant install the driver: Failed to load FTD2XX.DLL do I use the wrong cable .? Cant use ms41 flash tool now

[@pazi88]

Abdullah Demirkan Do you have cable with ftdi chipset? The tool won't work on cables based on CH340 chip.

[@AppieGTTI]

I saw the ftdi mark but not sure what kind of Numbers let you know

[@pazi88]

Abdullah Demirkan Check the usb to serial com port driver properties in device manager. it should say something.

[@AppieGTTI]

I had read it with mpps v12 but the file is 64kb I think that isnt the full eprom file the tune. And cant open that file in romraider because it isnt bin. or hex file. Thats the reason that I wanna try ms41 tool

[@pazi88]

Abdullah Demirkan 64k files are for ms43

[@tyewvarnes]

Just curious, can you read fault codes through the 16pin OBD2 connector in the car with pins 14&18 Permanently spliced together on the 20pin round plug in engine bay? I hear most people leave those wires spliced together and have no issues?

[@pazi88]

Tye Varnes Yes. No problem if those are connected.

[@samia817]

This is a useful note. I went out and bought the switch ready to make the modification then when I opened my adapter up I could see it was already shorted 14 - 18 - then I opened my spare one to check and it was also the same. So looks like most of them come already shorted and the switch is redundant in most cases.

[@pazi88]

That's new info for me. I haven't seen adapter that has those shorted. But yeah it doesn't hurt having those shorted all the time.

[@hermannweinzierl5731]

very good explanation!!

[@vwseb007]

What is the switch on the connector? Is that a bridge between 14/18 and 2/17 that enable writing?

[@pazi88]

Yes to to connect Pin 14 to Pin 18 to enable writing.

[@Porari666]

Mikähän ohjaus mahtaa olla -99 e36 320i? Mahtaako pysyä kärryillä minkäänlaisilla ahdoilla vakiona?

[@naher1]

Do u need flash voltage to read the partial? I keep getting an error when trying to read it saying access denied by ecu

[@pazi88]

No you don't. Are you sure your ms41 can be flashed? have you checked the ecu number?

[@naher1]

yeah its an ms41.2 from a 1998 US M3. It has been tuned by a tuning company before, is it possible that the company encrypted it?

[@pazi88]

Jonathan Youssef Yes it's possible. Some commercial tuners make their own code so that it can't be read.

[@mateusz19897]

Hi, can you help me? I have problem with download definitioo to my engine m52m20 with ms410DS3, I can't create accont on romraider, activation mail doesn't come. can You send definition file on mail? please :)

[@alexpamer591]

hello. I have 5WK9 0322-R ecu. Can i tune this ecu like you? It hasn't "index xx". And what is the R? Thank you for your answer.

[@pazi88]

What is the part number? The one that is 1 432 401 in my ecu for example.

[@alexpamer591]

The part number is 1 429 999. the engine is m52b28. The sticker as it is: www.google.hu/search?q=siemens+1429999&rlz=1C1GGRV_enHU751HU751&tbm=isch&source=iu&ictx=1&fir=M6WbcpiriTa4SM%253A%252Cq_FxCOO1H5wn0M%252C_&usg=__4LAJapW2aWTFU_H7aeNS5L52y9s%3D&sa=X&ved=0ahUKEwjTlYPUydjaAhXQ2qQKHZ9dD7gQ9QEIKzAB#imgrc=M6WbcpiriTa4SM:

[@pazi88]

Alex Pàmer Yes that can be flashed. It's bmw replacement unit that I have not ever seen myself.

[@alexpamer591]

I did not even see anything like that, so I was insecure. thank you very much for your answer. and thank you for the videos as well, it will help a lot in the following :D

[@PocezPanda]

Is it possible to delete/diable EWS2 imobilizer with this? Haven't found any good answers on forums, and EWS can be annoying when swapping engines with EWS into a car that doesn't have EWS wiring. :D

[@pazi88]

Yes it can be done easily with RomRaider

[@mathieutajan2790]

Hello pazi to increase the engine power it is necessary to increase base injection or wot enrichment or both thanks

[@pazi88]

Only WOT enrichment. But it's already too rich in ms41 so you could even try to lean it for more power ( 10% enrichment will give must power)

[@mathieutajan2790]

pazi88 thanks

[@thebigmann25]

Do you have to save it as bin? I was sent a remote tune and it wasn't a .bin file, and it worked when i uploaded it to my dme. I am editing the tune in romraider, and wondering if I need to ad .bin onto it for it to work?

[@pazi88]

will martens No you won't need to add that .bin to the name for the file to work. But atleast RomRaider doesn't show the files at file browser that don't have thst written. So it's better to add that.

[@hamzabenz7927]

NICE JOBE byt whene you adepte a turbo do you need to programe the ecu

[@miketoren_o]

Can you use an ms41 in a ms40.1 m50 wiring loom?

[@pazi88]

Yes. But not directly. You need to re-pin the connector.

[@nathanasad2908]

will any obd2/usb adaptor work if i bridge the pins myself and have the 20 pin adaptor?

[@pazi88]

Not all. It should have FTDI FT232RL chip inside.

[@nathanasad2908]

pazi88 Thanks for the response! Can you make a video on two step launch control using this? And turbo tuning would be awesome too!

[@brandonvelasquez3320]

How do we find the software version???

[@Dracuz123]

Your current version or new upgraded one? I assume the upgraded one. You won't get it, there is a policy on the Rom raider forum, that you don't share tuned files. Reason being that you learn it yourself.

[@GTO2800]

I bought a cheap 1999 MS41.0 for testing, because my car (M52B28) is 95 and the ECU is not flashable. If I manage to disable the EWS, is it safe to change the ECUs? Like mileage differences or pinouts?

[@pazi88]

GTO You can change to any ms41 ecu. Just flash it with correct software. You don't have to disable ews. You can just sync the new ecu with the cars current ews box. And you will need to do that if there is manual/auto mismatch. There will not be mileage issues etc.

[@GTO2800]

Thanks for your answer! I will try that :)

[@GTO2800]

Thanks a lot, I got it working! I used your 328i Stock Tune from RomRaider :) Cant wait for future videos, it would be interesting to learn the general approach to tuning, after you installed a M50 Manifold or a set of cams for example.

[@李孟宇-n2j]

awesome video

[@oscararnesen699]

Hey PAZI! Quick question. I can’t open full read files in romraider. I can only open Partial.bin (1429861) e39 523i

[@pazi88]

Yes that is on purpose. Full read files aren't meant for tuning. Partials only.

[@oscararnesen699]

@@pazi88 Thank you for quick answer! What are the full reads for then?

[@pazi88]

@@oscararnesen699 Full reads store the program code and other non-tube related info, so only needed if you want to do changes there. Usually used to change software version. But you have the newest for ms41.0 anyways.

[@oscararnesen699]

@@pazi88 Thanks again. Is it possible to make launch control on MS41.0 or do you have to convert to MS41.2?

[@oscararnesen699]

Last question, Can you put (1429861) DME code onto a (1432401)? Or is that a no go?

[@Krunoslav09]

Hi I have m52b20 96ms41. Engine haves lighted 6.5kg flywheel from e30. How much hp gain it will be if remap? Is there any figure about 180?

[@pazi88]

Krunoslav09 Only few hp. Remap on stock engine is not worth it.

[@Krunoslav09]

pazi88 ok, what about m54b30 with lighted flywheel exhouust headers and m50 mainafold? Thats winter project

[@pazi88]

Well that m50 intake is just going to make that engine worse. The m54 intake is best that you can put to m5x engine. But same thing. Stock engine so very minor gains from remap. I would put that time and energy to cam-swap and maybe then do remap. (and in case of dual vanos engine, get rid of those horrible stock exhaust manifolds with integrated kats.

[@Krunoslav09]

pazi88 thanks!

[@dekline474]

Do you have a secondary air pump and evap delete with the tune? I have us m52 swap and need to run obdii with m50 manifold . And want to pass inspection

[@pazi88]

JeLani Thrower No but you can delete those by yourself in rom raider.

[@dekline474]

pazi88 and if I were to do that and add m50 manifold and tune , plus a check engine light feature , would that trigger the light?

[@pazi88]

JeLani Thrower No if you do it correctly.

[@mathieutajan2790]

Hello i am on romraider and youtube i wanted to ask you i have a siemens ms41 which is not flash it is a 323i e36 so i buy one of 528i e39 i can copy 256k file of 323 in that of 528i? Both are ms41.0 323 is 1427703 and 528 and 1429861 i have flash tool ms41 thanks sorry for english i am french and i use Google translation

[@pazi88]

mathieu tajan No you can't copy. But you can find correct -861 partial from romraider forum at the stock roms thread. Just flash it in, do ews sync (or delete ews) and you are good to go.

[@mathieutajan2790]

pazi88 Ok so if I have understood I'm taking a roms stock of 323i 861 and I just flash the partial file in my 861 528?

[@mathieutajan2790]

pazi88 Has yes and 528i calculator and an automatic .It's good or not thank you very much

[@mathieutajan2790]

pazi88 m'y 323 is manual

[@pazi88]

mathieu tajan Then you don't do ews delete. Just sync the ews to your car and the ecu will learn from ews box that it is in manual car. Clear adaptations and you are good to go.

[@MrNYUNDERCOVER]

try to modify my obd2, the same way you did yours, but ran to a problem. ... my obd2 is wired different. #14 has a black wire... #15 is green... #17 has a white wire with a blue jumper, that go's to #20 and #19 is red.... so my question is what do I need to do to make it work? Don't want to burn anything out lol.......

[@pazi88]

MICHAEL MALDONADO What are you trying to modify? The round bmw plug to obd2 connector adapter?

[@pazi88]

If so the colors can be anything. The 17 and 20 are both data k-lines and the obd2 connector has only one so that's why those have jumper cable. For this you need second jumper wire from the pin 14 to pin 18.

[@thesneak281]

Can you use this for diagnostics? Reading and clearing check engine lights? If not what do you recommend?

[@pazi88]

The new ms41 Quickflash can read and clear dtc's from ms41 ecu. And also read adaptations etc. sites.google.com/site/openms41/read-write-41/ms41-flash-tool But if you need to access other ecu's too and like airbag etc. it's better to get inpa cable and sw pack from ebay for example.

[@mateusz19897]

Do You know, how can I change COM port in Siemens MS41 Flash Tool ? Because it's writing "cable disconnected" in system I have set COM 4 for BMW USB OBD Port. INPA and Testo worki great, but flash tool and romraider doesn't.

[@pazi88]

Flash tool automatically detects the com port if you have right usb-obd cable connected. There needs to be genuine ftdi chip inside the usb-obd cable, or otherwise the flash tool doesn't work. Some cheap cables for example use ch340 chip which will not work. The flash tool doesn't use the cable in com port mode, but directly controls the chip. That's why it needs to be correct type. The romraider logger will work with all types of cables. Just choose the correct com port and change to ds2 protocol. Before that you may need to enable and the disable the logging by defrost button in ssm mode.

[@mateusz19897]

pazi88 when I change protokol to DS2 the parametrach tab makes empty, I don't know, what's going on. Can You record movie step by step how set all parameters in setting romraider? Will be gratefull😉

[@pazi88]

mateusz19897 There will be parameters there when the ecu responds with ecu-id (bottom right). (And if you have correct logger definition file).

[@mateusz19897]

Ok, RomRaider and Logger work! But I have stil problem with MS41 flash tool, can You send me your e-mail? I will send to You file with my version Siemens MS41 flash tool, and if You can check on your cable it work? I checked my, is made of ftdi 1206-C FT232RL, but doesn't work :-(

[@mateusz19897]

pazi88 Done😏 I borrowed cable my friend's, but KKL to VAG, and.....works😀 I have image my ECU, and tryied change max RPM, I used value 7008, flash bin to ECU and doesn't work, engin rotates only to 6500 still. Must I change something else?

[@jeffreymes15]

Hi i have some questions about fine tuning for my mods M52b25,, m50,, 328 exhaust,, and bmc cold air intake,, i want to put 250cc injectors in it?

[@pazi88]

jeffreymes15 No need for bigger injectors, unless you are planning to run on e85 for example.

[@jeffreymes15]

Ah tnx! And with the Schmiedmann exhaust manifold?

[@pazi88]

jeffreymes15 No. stock injectors are good up to ~250 hp and you are not going to make even close to that with stock cams.

[@jeffreymes15]

What do you think i will make? M52b25 M50 manifold Bmc cold air intake Schmiedmann exhaust manifold M52b28 twin pipe exhaust M20 flywheel 4,9 kg 3.15 lsd diff

[@pazi88]

probably 190-210 hp.

[@covarix4951]

Hey pazi i am a little Bit confused right now. I have a 1997 e36 with a ms41.0... I wired a obd cable to the ews exactly like on the romraider Forum. Now i just need the obd cable. In Germany we have kcan, kdcan, dcan and many many other types of cables. The one that you have in your description is 1. Only for cars after 2001 and 2. Not available in germany and if i search k-line cable in german ebay or Amazon i just get some weird adapter from round 20pin to obd and one more short obd to obd cable. I hope you Can give me some clearity about all the different cables Amy help me for what i have to go with. Greetings

[@pazi88]

Covarix as said the cable in the link is tested to work.

[@covarix4951]

pazi88 But Not available in germany:(

[@sakirirkin9078]

I'm doing like a sign but nothing is changing Pazi help please stock m52 b28 6500 rpm 7000 rpm is not

[@pazi88]

Have you read back the changes from the ecu to make sure, those are really applied?

[@sakirirkin9078]

I am reading but it does not seem to change anything

[@sakirirkin9078]

I am doing the same but the car is not at 7000 rpm and the cutter does not enter

[@jerrynaslund3368]

Hi Is there any way to get the siemens ms41 flash tool today ? The guy is no longer with us ☹️

[@pazi88]

Yes: sites.google.com/site/openms41/read-write-ms41/ms41-flash-tool

[@jerrynaslund3368]

@@pazi88 Look like the page is down. Gonna try and email him.

[@77mRacing]

Awesome video! How does one tune the MS41.1 for forced induction? Can you cover that as well?

[@pazi88]

Matt Mellott Yeah in some future video.

[@FirstLast-tx3yj]

@@pazi88 my bmw is obd1 1992 m50nv I want to go turbo so does the stock ecu work or which one should I get?? It wasnt clear which ecu is needed for obd1 turbo car situation

[@alexandrosargyros8212]

I cant activate a romraider account and I need the ms41 ecu definitions is it possible to email me the XML file??

[@YahyaAhyani]

with what can i read and write for ms40.1?

[@pazi88]

You can't

[@YahyaAhyani]

whether reading ms40 can with (Quickflash MS41)? I am confused about tune ecu ms40

[@WickedTRX]

That's great info! Can we disable EWS, is there a problem not running a speed sensor to the ECU? it would be great if you could do a video about swapping a m52 and using the ms41.

[@pazi88]

WickedTRX Yes you can disable ews like this. Check the control bit section at the romraider forum. And no need for speed signal if you put vss error engine speed limiter to same value as the regular engine speed limiter.

[@moranz1]

i have answer , my ecu is ma4.1 but its index 11 can i tune it like this ?

[@pazi88]

Moran Zidan you mean the label says ms41 and index11? then yes.

[@moranz1]

Sorry , ms41 and index 11 Ok thank you !

[@mariuszczerwonka5249]

hi, i tried to register on romraider forum but they didn't send me activation email, can uhelp me somehow ? i would be thankfull for help

[@didulads]

Hi Pazi88, can there be any difference in the ECU map between the iron block(US) M52B28 and alu block(EU) M52B28? My wire harness, ECU(MS41.0) and everything is from an EU car which originally came with an Alu block. Now I have changed it to a iron block which I imported from US. Head and harness is from the old EU engine. Wire harness modified to support the rear mounted crank sensor. I heard that some US cars change(direct plug and play) their ECUs to MS41.0(EU ECUs) in their Iron block cars saying that they are less restrictive than US maps in MS41.1 ECUs. May be because of O2 sensors and emission regulations. So, will their be any issue if I use the same MS41.0 ECU with the same map which came with the Alu block with my new iron block? Like in the knock maps between Iron and Alu blocks. Thank you in advance for your valuable feedback.

[@pazi88]

Yes I know. I have extra hole in my rear muffler :D

[@rickkligma3375]

pazi88 hey thank you for your very helpful videos, I'm building an s52 turbo e30 with ms41.1 dme, do you know specifically how to disable/delete immo(ews)? Thanks you for your time.

[@rickkligma3375]

pazi88 can you send me your 24kb dump so I can compare it to mine? For the turbo? Specific maf tables I would appreciate it

[@doofy2063]

pazi88 how did you bridge the 20 pin connector with switch?

[@steffenkawa8374]

@pazi88 i wanna buy the MS41 Quickflash. But i have M52B28 from May 1995 in my E30. My ecu is flashable (ms41.0) The linked adapter KKL USB FT232RL - K-line diagnose works for newer engines. Because of that i have 2 questions. 1. Does the MS41 Quickflash work with my engine? 2. Which cable should i buy. Thx in Advance.

[@mohamedmostafa-zc5ju]

really i cant thank you enough for this valuable information..... but how can anyone choose between this and buying aftermarket ecu..... i mean what is proc and cons of both of them?

[@pazi88]

mohamed mostafa The biggest disadvantage of ms41 is lack of live tune. You have to shut down the car every time you make a chance. And also the ms41 is harder to tune than megasquirt for example. So for serious big hp build i would go with aftermarket ECU. But for milder builds that are meant to be daily drivers the ms41 is really good because it's very reliable OEM ecu.

[@lookmush]

I have euro ms41.0 can I upgrade to ms41.1 so I can enable the PIDs?

[@pazi88]

Yes you can. The maps are different so if you want to keep your engine running exactly like before, then you will need to copy all the maps from ms41.0 to ms41.1. Also you need to disable misfire detection because the ms41.1 uses rear mounted cps instead of front mounted and also need to disable few fault codes like downstream lambda probes.

[@lookmush]

thats great to hear. What I am thinking is keeping the ms41.0 and get it upgraded to ms41.1 without replacing the unit. if you have a link leading to this upgrade please share. Thanks a lot

[@pazi88]

Mush Alkarkhi Here is something: www.romraider.com/forum/viewtopic.php?f=42&t=13063 It's about 41.2 conversion but you could do that instead of 41.1. Those ba114 binaries are tested to work.

[@lookmush]

Thank you boss

[@przemyslawtomera8972]

Have you ever used MPPS? I’ve got a ms42 Dme and it reads and id’s the dme fine but I’m not sure if I want to hit the “write” button lol

[@pazi88]

No I haven't. I use mss5x flash tool for ms42 and ms43. More info in wiki: ms43wiki.com/index.php/MS42 Also do you know if the MPPS corrects checksums? If you do any changes, it requires checksum correction. Mss5x flash tool does that on the fly.

[@przemyslawtomera8972]

pazi88 well due to some unfortunate circumstances you can’t purchase the mss5x flashtool anymore and it’s not available for download from what I see. I’d love to get it but doesn’t seem too possible. I’ve had terrible luck with jmgarage flasher and countless cables. MPPS seems to do checksums but I think I’d rather trust Ultimo with it.

[@deejaytonio7577]

Hi pazi, I buy your OBD1 20 pin adaptator from your link but I don't have the switch to enable write mod ? Is it you who add the switch or it's a special cable ?

[@Dracuz123]

Yes, he added it. I did it myself, it's quite simple: just open it and buy an on/off switch and just put it between the bridging wire. You can take a dremel and fit the switch in the case of the cable.

[@123456789sha]

hey man can you provide a link for the software please? im working on a engine swap but i need to remove EWS from the MS41.0 DME..

[@pazi88]

Sharukh Bhoelan Unfortunately it is not currently available because the creator has passed away. You need to use galetto for example. There is also another tool coming soon. I will update link to that when it's done.

[@pazi88]

Update: The newer mss5x flash tool is currently available. It can do ms41 flashing too as the ms41 flash tool. Only minus being that you can't convert between ms41.0 and ms41.2 for example. Link: ms43wiki.com/index.php/Main_Page#Flashing_Software The .exe is still missing but ask it from the email.

[@andreicernega]

Hi pazi88, can you please tell me what model of galetto in need to buy so I can remove the EWS ?

[@samia817]

Hi Pazi88, first up thanks for taking the time to make these helpful and informative videos, I'm hoping you - or indeed anyone - can help me out with a small issue. I have the K-Line cable with the appropriate 232RL chipset. I have the OBD2 to OBD1 converter, which already came with the pins bridged, and I am using the MS41 QuickFlash program as you recommend. Anyway, I can read the maps fine, do my comparison, edit and save the map OK using RomRaider, but no changes are being made to the map. Now I am aware on the OpenMS41 site there is a page regarding enabling write access, so I am assuming this is the issue - but the instructions are a little vague. it says: 1. Locate the x20 Diagnostic Link Connector near the RH strut tower in the engine bay and unscrew the cover. 2. Use a small piece of wire to connect Pin 14 to Pin 18 to put the ECU in Write mode. 3. Use a small piece of wire to connect Pin 2 to Pin 17 to bridge the OBD2 port in the car to the ECU. 4. Turn the ignition on, and use MS41 Quickflash to read/write the ECU. So I have the following questions about that procedure... Firstly, does Step 2 have the same effect as bridging pins 14 & 18 in the OBD1 converter cable? Second, is step 3 relevant on a UK car (Z3 2.8, 1997) that as far as I know has no OBD2 port in the car? Third, is bridging those pins with the ignition off sufficient, or do I need to cycle the ignition, then remove them, then plug the cable onto the round socket? If this isn't the cause of my problem, what else am I doing wrong? I feel like I am 90% close to completing my first ECU remap but I am stumbling at the last hurdle! Any help gratefully appreciated!

[@ke70gt18]

I've got the same problem the tune wont stick to the ecu

[@ke70gt18]

try downloading a standard map from rom raider and see if that will stick

[@samia817]

did that work for you then?

[@ke70gt18]

I tried it last night and still had no luck with mine the quick flash gets to 99% complete when writing and tells you to turn off you ignition for 10 seconds but the map hasn't changed

[@ke70gt18]

Reading the map isn't a problem ive done pin 14 to 18 and got the right bmw usb plug so im not sure what im doing wrong im tuning an m52b28 with a ms41. 0 index 10

[@101088kaka]

Is there any guides on how to convert a ms41.0 to a ms41.2?

[@pazi88]

www.romraider.com/forum/viewtopic.php?f=42&t=13063

[@e36schrauber]

Thank you very much

[@dangerousdave321]

Absolutely fantastic videos! I have an ADS to serial port connector I use for inpa, would that cable work with open ms41 as well?

[@pazi88]

No the ADS cable doesn't work with ms41 flashtool. You will need usb-obd2 cable with FTDI chip like this: goo.gl/izh4wE

[@TheQlimaxx]

Is it possible to convert M50 bosch ecu over to a MS41 ?

[@pazi88]

Yes if you change also the wiring harness and all the sensors also.

[@TheQlimaxx]

need to ews delete on ecu?

[@pazi88]

James Nguyen Yes if you don't want to retrofit it to your car. Check the control bits section for ms41 in romraider forum.

[@TheQlimaxx]

pazi88 many thanks love your videos :)

[@helpster6403]

Hey where can i get exactly this software ? like i read the original creator died last year and today you only can get an version that aguy made from data that the original maker of the quickflash sent him... Is this safe to buy or what should i do ?

[@pazi88]

Hel pster Yes the quickflash is the sw to buy. It does same things and bit more than the ms41 flashtool.

[@helpster6403]

perfect. Thanks i bought it. Really fast and nice communication with the seller.

[@kylejcool]

thanks for the video!

[@RonnyScott]

Sweet Video! Have you ever used the galleto 1260? I'm just curious because I've done everything that OpenMs tells you to do(solder the pins, software, xml file, definitions ect ect) right at this moment all I'm looking to do is log, but the tool doesn't connect to the car, any ideas?

[@pazi88]

SuppaNova2012 Sorry I don't have experience using galetto. It should at least be able to do partial reads and writes. But before writing you need to remember to calculate the checksums. (or disable those using romraider).

[@msdrift614]

how to play with speed of the rev limiter??

[@pazi88]

With the hysteresis and return delay values.

[@RecreationAutomotiveGarage]

so since you're using romraider for tuning would the tactrix cable work on the bmw?

[@pazi88]

Probaply not. The ms41 falsh tool requires "dumb" interface that just lets the tool communicate directly with the car. The tactrix cable does the communication itself so it requires it's own specific software to work. Which doesn't support BMW ECU's.

[@TheFissiM]

how to get this definitons pls can any help me ? I buy flash tool

[@pazi88]

You can get those from RRforum after registering. The registering can take some time because of the email confirmations.

[@TheFissiM]

@@pazi88 yes i know but im waiting 4 days... this is why i ask

[@terrancevick9883]

Can the ms42 dme be tuned with this software?

[@pazi88]

Terrance Vick Yes. You will need this bit more expensive flash tool for that: chipster.no/index.php?_route_=Software/Siemens-MSS5x-Flash-Tool-MS41-MS42-MS43-MSS50-MSS52-MSS54 and you also need to convert the ms42 to use differnt software version if yours is wrong. Check wiki: www.ms43wiki.com/index.php?title=MS42

[@terrancevick9883]

Ok thanks a lot.

[@ziReActz]

I'm having trouble with my romraider account activation and I need the ms41 ecu definitions is there anyway you can email me the XML

[@weedi696]

thank you for sharingI'm having trouble with my romraider account activation and I need the ms41 ecu definitions is there anyway you can email me the XML or direct download link, any one can help please

[@sinanicik706]

Ülkemizde paypal kullanılmadığından ms 41 flash satın alamıyoruz yardımcı olurmusunuz

[@pazi88]

The new flash tool is made by busterhax -nick at RomRaider forum. You can ask him about alternate payment method.