Fiat 1.8 16v lost sync

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

Moderators: jsmcortina, muythaibxr

jsmcortina
Site Admin
Posts: 39619
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Fiat 1.8 16v lost sync

Post by jsmcortina »

The update was pre-1.4 beta 12

Please post here when you have tried it.

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".
vassili80
MS/Extra Newbie
Posts: 20
Joined: Wed Jan 14, 2015 1:54 pm
Location: Italy

Re: Fiat 1.8 16v lost sync

Post by vassili80 »

Hi
Tried today,but the offset now is at -10 degrees.
Take a look to the msq.

14.beta.12.msq
Luca
jsmcortina
Site Admin
Posts: 39619
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Fiat 1.8 16v lost sync

Post by jsmcortina »

I double checked and only altered the code by 5 degrees. So, if you are really seeing a 15 degree change between the two versions, then perhaps the wheel definition (tooth sizes) is incorrect.

Please could you test the timing of your engine using "Fixed Advance"
Set 0 degrees and strobe it - is it really 0 ?
Set 10 degrees and strobe it - is it really 10 ?
Set 20 degrees and strobe it - is it really 20 ?
Set 30 degrees and strobe it - is it really 30 ?

Check at 1000, 2000, 3000 RPM

For pre-1.4 beta14 I'm going to put the code back to how it was when you were seeing a 5 degree offset. I need the data on the above tests to know how to move forwards.

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".
vassili80
MS/Extra Newbie
Posts: 20
Joined: Wed Jan 14, 2015 1:54 pm
Location: Italy

Re: Fiat 1.8 16v lost sync

Post by vassili80 »

Or my old 5 deg offset is -5 offset...
Ok, when I have a little spare time I will test and post the results.
Have I to use a specific firmware or may I use the "first working one"?. (pre 1.4 beta 10 )
Luca
jsmcortina
Site Admin
Posts: 39619
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Fiat 1.8 16v lost sync

Post by jsmcortina »

vassili80 wrote:Or my old 5 deg offset is -5 offset...
Ok, when I have a little spare time I will test and post the results.
Have I to use a specific firmware or may I use the "first working one"?. (pre 1.4 beta 10 )
Please use pre-1.4 beta 14 that I just posted.

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".
jsmcortina
Site Admin
Posts: 39619
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: Fiat 1.8 16v lost sync

Post by jsmcortina »

Did you have chance to try this out?

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".
vassili80
MS/Extra Newbie
Posts: 20
Joined: Wed Jan 14, 2015 1:54 pm
Location: Italy

Re: Fiat 1.8 16v lost sync

Post by vassili80 »

Hi
Sorry for delay,but i am waiting the new timing light.
Maybe during the weekend I hope.
Luca
vassili80
MS/Extra Newbie
Posts: 20
Joined: Wed Jan 14, 2015 1:54 pm
Location: Italy

Re: Fiat 1.8 16v lost sync

Post by vassili80 »

Hi.
This is the msq with new timing light.
9-04-2.msq
And yes,at 2000 and 3000 rpm the timing is the same.

Sorry for delay but saturday my car was crashed on the rear by a citroen c3.
Luca
Post Reply