Converting MS3 Basic to run k24z3
#42
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can you expand on this? I opened my board again and verified it isn’t laid out at all like a ms3 so I can’t follow that hw manual.
I drove the car again today and had the failure at almost exactly the same rpm.
#43
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I reread your post and understood it. Confirmed there is a 5v pull-up on the crank sensor via testing. I’m going to play with different settings now to see if I can resolve this.
#45
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Thanks for the info.
fwiw I did composite lots of both rising and falling edge triggers. Rising edge was worse and also suffered timing drift. I went back to falling edge. Issue is not resolved. I feel real stuck….
fwiw I did composite lots of both rising and falling edge triggers. Rising edge was worse and also suffered timing drift. I went back to falling edge. Issue is not resolved. I feel real stuck….
#46
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Omg I hate myself. Noise filtering was the issue. I turned it on while trying to test VVT settings and the filtering was too significant at high rpm’s and masked real teeth!!
solved. Now to fix my throttle plate sticking slightly open.
solved. Now to fix my throttle plate sticking slightly open.
#48
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How is everyone else doing on their setup? I think I’m going to move away from megasquirt this winter. I’m still struggling with loss of sync. I’ve added a better ground, built an external filtering circuit which pulls the sensor up to 12v and uses an opto-isolator and Schmitt trigger to pre-filter the crank signal.
While that circuit helped a lot, I’m still having one or two loss sync episodes during a 30 min drive. the circuit isn’t great, because it’s essentially just redoing the internal megasquirt circuit which is known to have issues on high tooth count. It isn’t fast enough.
I think being that this is a MS3Basic from rev I can’t switch to using the VR circuit design with adjustable POTs.
I’d probably be willing to live with a loss of sync every now again, except the car won’t resync without a power reset. I suspect this is because my trigger offset is 396 aka a full rev off and I bet the firmware can’t handle that. Just a guess.
so unless I can have a foolproof solution to this problem I’ll likely switch to haltech…
While that circuit helped a lot, I’m still having one or two loss sync episodes during a 30 min drive. the circuit isn’t great, because it’s essentially just redoing the internal megasquirt circuit which is known to have issues on high tooth count. It isn’t fast enough.
I think being that this is a MS3Basic from rev I can’t switch to using the VR circuit design with adjustable POTs.
I’d probably be willing to live with a loss of sync every now again, except the car won’t resync without a power reset. I suspect this is because my trigger offset is 396 aka a full rev off and I bet the firmware can’t handle that. Just a guess.
so unless I can have a foolproof solution to this problem I’ll likely switch to haltech…
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