Ms3 with ms3x k24a2 engine (from acura tsx)

[jsmcortina]

OK, from those logs I see that the crank is 12+1 and the cam is 4+1.

Please attach your current MSQ and a matching datalog if you can.

James

[Barton]

Ok, here you can see the variator retardes de camshaft just at 5600 rpm without any reason, then at 7k rpm it just does't work until de rpm are below of 7000.

[jsmcortina]

You don't appear to have calibrated the min/max values of the VVT outputs.

There's no output configured for cam 1?

PT6 (Datalog in) as the second cam input has a known frequency limit - you either need to remove the capacitor C12 on the MS3X card or use input PT4 instead. That probably explains the flat-lining VVT2 at high RPMs.

There've been some VVT code changes along the way that might help, so I would suggest that you try the latest pre-1.4 beta development code too.

James

[Barton]

Ok there isn't an output for vvt1 because this engine has only one variator (in the intake camshaft), the main cam sensor is in the exhaust camshaft.

I'll upadate the firmware and remove de capacitor in few hours.

But do you know why the vvt1 angle spikes??

Thanks

[jsmcortina]

But do you know why the vvt1 angle spikes??

It is probably reading the +1 tooth. However, as you aren't using VVT1 then it is irrelevant.

James

[Barton]

It is probably reading the +1 tooth. However, as you aren't using VVT1 then it is irrelevant.

James

ok, that means the MS does not use the vvt1 angle to compare it to the vvt2 and calculate the vvt2 duty?

It is probably reading the +1 tooth.James

I can't use COP as ignition (I'm using wasted COP), Would this +1 tooth be the problem?

[jsmcortina]

It is probably reading the +1 tooth. However, as you aren't using VVT1 then it is irrelevant.

James

ok, that means the MS does not use the vvt1 angle to compare it to the vvt2 and calculate the vvt2 duty?

VVT1 angle is tracked against VVT1 target and is controlled by VVT1 duty.
VVT2 angle is tracked against VVT2 target and is controlled by VVT2 duty.

It is probably reading the +1 tooth.James

I can't use COP as ignition (I'm using wasted COP), Would this +1 tooth be the problem?

What happens when you try to run COP? Attach a datalog and MSQ and description in words.

This topic has been running for such a long period of time that I don't recall the specfic details of the wheel decoder without checking into it all.

James

[Barton]

when you select COP mode the engine only makes backfires and never starts.


the MSq is the same of my last post, named Piolin.msq

[jsmcortina]

when you select COP mode the engine only makes backfires and never starts.

Sounds like 360 deg out of phase. I'll send you a test code with the phase swapped.

James

[jsmcortina]

Hang on...

the MSQ has "Honda TSX/D17" mode selected, not the "Honda K24A2" mode that I added for you ?!?!

Please confirm why that's the case.

James

[Barton]

Ok, I can't remember why I'm using that code, but I can try again with the k24a2 code to let you know.

[pimp4lyphe]

Hang on...

the MSQ has "Honda TSX/D17" mode selected, not the "Honda K24A2" mode that I added for you ?!?!

Please confirm why that's the case.

James

James,
I'm trying to use the k24 code on MS3 1.4 but I keep getting an error when I try to enable VVT. Msq is attached.
Thanks

[jsmcortina]

Msq is attached.

I'm not seeing it at the moment.

James

[pimp4lyphe]

Msq is attached.

I'm not seeing it at the moment.

James

My bad, edited the previous post with the attachment.

[jsmcortina]

K24A2 wasn't allowing VVT. I'll send you a test code by email. You may need to reconsider your outputs due to hardware PWM constraints.

James

[daniel_insemsa]

Hi, I have problem with vvt in k24a2 mode. not support. MS3X firmware 1.4, and not run the engine in COP, only in mode wasted COP.

Thanks.

[Barton]

hello, I have the k20 running well but I'm using the vvt output to drive the vtc solenoid, and the mitrous 2 output to activate the vtec solenoid, so, how can I do to use the vtec activation parameters and the table choice's source by the vtec (vvt on/off)??

another thing, is possible to have two vvt intake tables? like the hondata ecu has? (vtec on/off)

Ms3x 1.4.1
k20z3
civic ef 1990


thanks

[Matt Cramer]

I would use a "generic PWM" setting to activate the VTEC solenoid and the VVT settings for the VTC.

[Barton]

I would use a "generic PWM" setting to activate the VTEC solenoid and the VVT settings for the VTC.

yes, I have no problem activating the vtec, the problem lies in dual map source (vtec on/off), how would the ms know when to switch from ve1 and ign1 to ve3 and ign3??

[Matt Cramer]

I don't use table switching with VTEC tunes myself.