Dead time verification

[Marek]

Would it be possible to have the facility to enter the test mode on a running engine, flag one or more cylinders up and then make the engine run semi-sequentially instead of sequentially and look to see whether the EGO readout goes leaner or richer?

I appreciate that the test mode has the abilty to do semi-sequential instead of sequential and that the manual says switching can be "on the fly", but when I tried that, the engine stopped and the flyback circuitry traces on my pcb melted. In another thread, http://www.msextra.com/forums/viewtopic ... 31&t=57570 it is suggested not to do this but the manual still hasn't been updated.

17.22 of the MS3 Tunerestudio manual still states

"This allows on-the-fly switching between full sequential and other modes to test the effect on engine operation,
not all options are appropriate for all engine configuration. "

Can you please at least clarify what you can and can't do.

kind regards
Marek

[AbatelliCristian]

yes ms3 firmware have this "injection sequential testing".

[jsmcortina]

I appreciate that the test mode has the abilty to do semi-sequential instead of sequential and that the manual says switching can be "on the fly", but when I tried that, the engine stopped and the flyback circuitry traces on my pcb melted. In another thread, http://www.msextra.com/forums/viewtopic ... 31&t=57570 it is suggested not to do this but the manual still hasn't been updated.

This is not the same thing.

There's a test mode that specifically lets you do this switching, the topic is discussing changing the normal configuration setting.

James

[Marek]

No.

I am talking about the test mode.

The manual says you can change from sequential to semi-sequential "on the fly" but in a thread on the forum, Matt Cramer says "Don't do it" and if you try it on a running engine, then "The engine will stall".

I'd love to have a running engine and swap modes just to see whether it runs a little leaner or richer, but not at the expense of building yet another set of peak and hold driver flyback circuits when it goes bang and stalls again.

Is the manual correct that you can change modes "on the fly" or not? For the avoiudance of doubt, by that I mean if you have it set to being a sequential engine in the general settings, are running the engine normally, enter the test mode whilst it is running, swap it into semi-sequential using the test mode, will it go bang and stall? If not, what was Matt Cramer on about?

kind regards
Marek

[racingmini_mtl]

Ignore this because it is not correct

You can't go in test mode with a running engine; RPM has to be at 0.

Jean

[Marek]

Thank you.

Then perhaps the wording in the manual can finally be changed.
It says "on the fly".

kind regards
Marek

[racingmini_mtl]

Ignore this because it is not correct

"On the fly" doesn't mean that the engine is running. It just means that you don't need to power cycle the ECU to change the mode.

Jean

[jsmcortina]

Actually it does.

Please see the manual. http://www.msextra.com/doc/pdf/html/Meg ... 4-291.html

James

[racingmini_mtl]

I'm sorry, I stand corrected. I'll let those better informed than I am handle this.

Jean