Hi!
Out there there are some engines that have the cam edges really close do crank edges. As i've understood it (speaking about the n-1 configuration plus 1 tooth cam signal before the pms) ms have an isr for the cam trigger and one isr for the vr trigger, if both fire together isr cam together weired things can happen due to the delay of the isr that came last.
Last engine with this problem i've had to redrill the crank pulley....
Isn't possible to enable a new mode that instead of waiting an isr, we check the level of the cam signal on the crank isr, so that there isn't a second isr that interfere?
Really thanks!
Cam trigger that coincide with crank trigger
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Cam trigger that coincide with crank trigger
Enrico
Opel/Vauxhall Corsa GSi MS2
Subaru v4 EJ20 MS3
Opel/Vauxhall Corsa GSi MS2
Subaru v4 EJ20 MS3
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Re: Cam trigger that coincide with crank trigger
I have test in fiat 500abarth with MS3. The engine start well in full sync, but in first test, I noticed low power respect previous ecu...I have not done a fine tuning to the dyno, but first impression is low power and high EGT. I don't know if the problem is the tune (I had little time to test) or is there really a problem.
BestRegards
Cristian
BestRegards
Cristian
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Re: Cam trigger that coincide with crank trigger
"Poll level" already exists. Is that what you mean?masterx81 wrote:Isn't possible to enable a new mode that instead of waiting an isr, we check the level of the cam signal on the crank isr, so that there isn't a second isr that interfere?
Perhaps posting a composite log would help.
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
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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".
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Re: Cam trigger that coincide with crank trigger
In my test I dont have used poll level, but I use rising adge..."Poll level" already exists
I will make new tests more accurate
Re: Cam trigger that coincide with crank trigger
So poll level do already this? So that the edges of cam and vr can be together?
Whops, missed that, nice!!!
Thanks james, never used that setting!
Whops, missed that, nice!!!
Thanks james, never used that setting!
Enrico
Opel/Vauxhall Corsa GSi MS2
Subaru v4 EJ20 MS3
Opel/Vauxhall Corsa GSi MS2
Subaru v4 EJ20 MS3