Megasquirt ON BMW m52 Engine

General support questions and announcements for MS3. See also MS3 manuals.

Moderators: jsmcortina, muythaibxr

maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

protomor wrote:There's no RPM signal in this datalog. Can you spit out a composite log and trigger log for me?

edit: too lazy to look back.Do you have the 10k resistor in line with your crank signal? If not, it's def needed.
rpm is white line yes? it is shown when i try to start engine... for example from time 228 to 230, rpm signal have to come all time? while just opened ignition?

i dont know how to split it... i will search now how to do it...

resistor ? no, i use resistor only in start circuit...

no other resistors i use...

so i need to buy 10k resistor yes? how much watts?
Image
here have to go resistor yes?



also maybe someone knows what are that 3 wire that comes in crank sensor? i;ve tested it and 1 is ground, second(yellow) comes from ecu and i got ~3V in it... and 3 is red and not comes any voltage in it...

on stock ecu, comes 5v in yellow wire...
Last edited by maxo-tt1 on Tue Apr 17, 2012 5:47 am, edited 4 times in total.
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

double post
billr
Super MS/Extra'er
Posts: 6828
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: Megasquirt ON BMW m52 Engine

Post by billr »

Wow, we are "out in the weeds" here! I, too, got tired of wading through the whole thread; but, has this engine ever fired and run with the MS? Has it been established if the crank sensor is VR or Hall/opto? I see reference to a "3-wire" sensor, which would be Hall/opto and another reference to a 10K series resistor, which would be VR, right? Bottom line, is in that whole log posted I only see a brief rpm excursion to 35, then another brief one to 135... the rest is all dead zero. That indicates bad trigger signal. Yes, there should be an rpm value/trace as long as the engine is rotating; cranking and running.
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

billr wrote: has this engine ever fired and run with the MS?
no, not with megasquirt...

billr wrote: Has it been established if the crank sensor is VR or Hall/opto?
i believe its hall.. as i've searched over the net...


billr wrote:another reference to a 10K series resistor, which would be VR, right?
cant understand this part... so only VR needs resistor?

billr wrote: Bottom line, is in that whole log posted I only see a brief rpm excursion to 35, then another brief one to 135... the rest is all dead zero. That indicates bad trigger signal. Yes, there should be an rpm value/trace as long as the engine is rotating; cranking and running.
yes, 135 rpm while cranking... while not cranking, its zero... its not normal?

any idea what can i do? :)

thanks anyways for post...
billr
Super MS/Extra'er
Posts: 6828
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: Megasquirt ON BMW m52 Engine

Post by billr »

Do you have the pull-up jumper installed on the mainboard, as required for most Hall sensors? I'm going to look at your log again, be right back...
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

billr wrote:Do you have the pull-up jumper installed on the mainboard, as required for most Hall sensors? I'm going to look at your log again, be right back...
there is 3 jumper on mainboard... which one you talk about?

i've bought assembled one... and i've changed nothing...

http://www.diyautotune.com/catalog/mega ... p-435.html


Image
just connected js11 to spr4 with brown wire...
billr
Super MS/Extra'er
Posts: 6828
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: Megasquirt ON BMW m52 Engine

Post by billr »

Generally speaking, JP1, J1, R57, and pots R52 & R56 all have to be configured properly. If that doesn't make sense to you, now is the time to start digging into the MS documentation! MS is capable of operating with a wide range of ancillary sensors and actuators, so it wouldn't have been necessarily set up for your application as-shipped unless you had asked for that specifically.
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

not easy digging the documentation, when you don't know what to search :cry:

thats my config(originally by hoveringuy)

on pre 1.1 beta 18
billr
Super MS/Extra'er
Posts: 6828
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: Megasquirt ON BMW m52 Engine

Post by billr »

There is a lot of documentation, and it can be daunting, but that is far better than not having little or none! And that is not even considering that the source-code is also available... I'm no good at pasting in links to the manual, but go to <msextra.com>, then look for "documentation", then "MS3", then "board assembly". At the end of that section is info on setting up the V3.57 mainboard.
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

people,

i couldn't find vehicle speed signal from cluster. is this one the must to start engine?

42 29x Black/White VSS - from cluster N2O IN Can also use MS3x spare ADCs as inputs 12v or GND switched input
protomor
Experienced MS/Extra'er
Posts: 367
Joined: Wed Feb 28, 2007 7:13 pm

Re: Megasquirt ON BMW m52 Engine

Post by protomor »

cluster doesn't need to be in the car for it to run. So that wouldn't keep the engine from starting.
-Yoshi-
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

protomor wrote:cluster doesn't need to be in the car for it to run. So that wouldn't keep the engine from starting.
aha, i think so as well...

hm

already don't know what to think...


maybe i've bought not proper cam sensor? how do you think, cam is must for sequential injection to start engine?


who can share msq file for m50/m52 please ? maybe mine not works ok?
protomor
Experienced MS/Extra'er
Posts: 367
Joined: Wed Feb 28, 2007 7:13 pm

Re: Megasquirt ON BMW m52 Engine

Post by protomor »

there's an MSQ in my ignition break up at 4k thread just below this one.
-Yoshi-
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

protomor wrote:there's an MSQ in my ignition break up at 4k thread just below this one.
Moore_08d.msq ?

its not sequential... :( you don't use ms3x board?

and please someone tell me m50 cam sensor uses +5v power or +12v?
protomor
Experienced MS/Extra'er
Posts: 367
Joined: Wed Feb 28, 2007 7:13 pm

Re: Megasquirt ON BMW m52 Engine

Post by protomor »

Yea I'm on an MS3x board. It's def sequential dude.

I don't even remember setting voltage settings for the cam sensor. Didn't know you could?

Can you post composite and trigger logs?
-Yoshi-
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

protomor wrote:Yea I'm on an MS3x board. It's def sequential dude.

I don't even remember setting voltage settings for the cam sensor. Didn't know you could?

Can you post composite and trigger logs?
hm, it seems to be sequential but much different from mine... i;ll try it tomorrow... you doesn't use alpha firmware yes?

which version do you use?


about trigger logs, i'm not sure i've saved it correctly ... i've started composite logger in diagnostics tab, but it seems everything not ok.. it logged only one time that i tried to start engine....

doesnt logs on every try...

thats all i got from diagnostics today....
protomor
Experienced MS/Extra'er
Posts: 367
Joined: Wed Feb 28, 2007 7:13 pm

Re: Megasquirt ON BMW m52 Engine

Post by protomor »

I forget what firmware I use. It's whatever the latest stable release is.

Your composite log is very short but you're getting both cam and crank signals. What about a trigger log?
-Yoshi-
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

protomor wrote:I forget what firmware I use. It's whatever the latest stable release is.

Your composite log is very short but you're getting both cam and crank signals. What about a trigger log?
trigger? i dont know :) i have to start trigger log separately ? i have only this file... :( i'll try trigger tomorrow...

so signal comes from cam sensor? hm, what it may be then? :cry:
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

i;ve downgraded firmware to 1.0.6 and tried your msq file... engine not started :(


and another bad thing.... trigger log shows nothing... logs nothing... empty black window, like not started. what that means ? what information does trigger log contain ?
maxo-tt1
Helpful MS/Extra'er
Posts: 142
Joined: Wed Dec 21, 2011 1:27 pm

Re: Megasquirt ON BMW m52 Engine

Post by maxo-tt1 »

i've just bought bosch 3.3.1 harness and rebuilding the wiring

one question please

http://www.megasquirt.325ix.com/MS_to_M ... 3.3.1.html

on the diagram above motronic pin 1 is connected to ms3 37

and motronic 38 connected to ms3 37 also... its ok?
Post Reply