Engine dies sync lost reason 2 after firmware update (solved

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

Moderators: jsmcortina, muythaibxr

jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by jsmcortina »

PUMPISH wrote: the car run just fine with this setup before I changed the firmware
Have you tried reverting to the old firmware and tune? (Did I asked this already?)

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

But strange thing is that with my old ECU i got sesets error sync 2 only when i boost more then 250 kpa on 3th gear.

But now with a brand new v3.0 card and all setings just the same , I get resets at the idle and rpm drops at 3000rpm.

Same setup, same engine, same ms3x i was driving this car everyday for 2 years and rev 8500 and never had any problem.
We install many of this setup on many cars and all them running just great.

Thats why i dont understand how it possible that I got this issue when I upgrade the firmware and now does not matter what i do and what firmware I use I have resets.

I even have a pot on tacho input so I can adjust between 0 and 100k resistance.
Before I used to adjust to 22k.
Now nothing happens, only if i increase to 70-80k then I can rev up to 4000-4500. If I increase more up to 90-100k then the rpm drops at 3000 again.
If I adjust at 0-10k then the RPM drops at 1500-2000.

Before I could easy rev 9000rpm with a 22k
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

jsmcortina wrote:
PUMPISH wrote: the car run just fine with this setup before I changed the firmware
Have you tried reverting to the old firmware and tune? (Did I asked this already?)

James
James I just tried allmost every firmware and rpm drops at 3000 rpm, does not matter.
I tryed 1.1.2 and then I cant even run the car, it just dies after few second, can not find sync. sync error 17

1.3.0
1.3.1
1.3.2
1.3.3 beta just the same, the cars starts very easy and run very well but can not rev more then 3000 rpm after I install brand new v3.0 card

Now I switched back to 1.3.2 and dont know what to do.

I just become crazy soon because I allready missed several race and car shows and must lie to all poeple all the time that I dont drive the car because of making a new paint, because I do not want to spread bad rumors about MS because it's already enough people who talk bad about ms in Sweden :cry:
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by jsmcortina »

PUMPISH wrote:sync error log
I looked through your log and when you get a problem, the teeth after the missing tooth region is getting "swallowed up" - the wheel counts 57 teeth instead of 58 teeth and the missing tooth region is 24 degrees wide instead of 18.

This is surely an electrical problem with the sensor or VR detector circuit and pots.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

jsmcortina wrote:
PUMPISH wrote:sync error log
I looked through your log and when you get a problem, the teeth after the missing tooth region is getting "swallowed up" - the wheel counts 57 teeth instead of 58 teeth and the missing tooth region is 24 degrees wide instead of 18.

This is surely an electrical problem with the sensor or VR detector circuit and pots.

James
thanks!

I tryed 2 vr sensor today and 2 different cables with no diference.
So it must in ECU.

Strange because the guy who build MS for me used brand new parts
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by jsmcortina »

Have you adjust the VR pots ?

Really you need to scope the signal at TSEL and TACHSELECT to see what's going on.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

jsmcortina wrote:Have you adjust the VR pots ?

Really you need to scope the signal at TSEL and TACHSELECT to see what's going on.

James
Yes i tryed to adjust the pots.

The trange thing that when we make this engine setup mercedes m103 and m104 and we made many of them , we allways use the same stock sensor and the same triggerwheel.
And it works allways best when the both pots all the way counter clockwise and 22k resistor tacho in signal.
Thats why I dont undestand why its happened now.

Maybe its worth to remove C31 and try?
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by jsmcortina »

Do you have access to an oscilloscope? That would be extremely helpful here and you can see exactly what is happening.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

jsmcortina wrote:Do you have access to an oscilloscope? That would be extremely helpful here and you can see exactly what is happening.

James
Actualy I have PicoScope 2204 but I just need to learn how to use it
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

James I try to learn osciloscop today.

I cuted c31 now and the error log looks different now but stil drop the rpm
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

here is log with a noise filter
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

I am trying osciloscop now and when I connect chanel A to tachno signal line and choose DC and Auto then I can not rev more then 1500 rpm
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

i dont know if it is much fdor help but that i can see that the signal looks the same at the time the rpm drops and resets
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by jsmcortina »

Where was that scoped? Can your scope go faster? There's not really enough resolution there.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

jsmcortina wrote:Where was that scoped? Can your scope go faster? There's not really enough resolution there.

James
Dont know howto make it faster, I tryed to read TSEL today but I can only save 1 page at the time
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

I found a better software today picoscop 6 automotive so tomotorow I can make a better log
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

Found the video from yesterday, TSEL scop.
As you hear that the engine drops rpm all the time and resets but the signal stil looks the same

http://websta.me/p/806492406629316388_34468116
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

I think its time to go to the doctor.

Now i got more brandnew ms3x and with this ecu I can rev to 8000rpm at the idle without problem but i i drive and boost more then 200-250kpa I get resets again and error sync 2

Here comes new data log and sync error log

When I switch back to my first new ECU then rpm drops at 3000rpm at thh idle.

Same settings, same pot install, all new sensors, cables and everything.

How it is possible?
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

update.

I cuted c31 on my 1th MS3x and no matter stil rpm drop at 3000rpm and sync loss 2
Then I cuted c32 and now I can rev up to 8000rpm with no sync loss BUT i got sync loss 2 at cranking instead and sti more difficult to start the engine.

It feels so strange that 2 brand new completly the same ms3x can behave so diffirent.

there is no possibility to produce stronger and more reliable vr circuite?
PUMPISH
Master MS/Extra'er
Posts: 436
Joined: Mon Jan 28, 2008 3:46 pm
Location: Sweden (Stockholm)
Contact:

Re: Engine dies sync lost reason 2 after firmware update

Post by PUMPISH »

By the way I found out I thing.

When the engines just dies under load that was because of noise filter.
Without noise filter it just RPM drop instead
Post Reply