Crank and cam signal question - logs attached

[Yves]

I'm not used to looking at this. Does this look normal ?

I attached the csv file, datalogs and msq during this short time I had the engine idling.

Seems to hunt. Still figuring out what it's doing.

[elutionsdesign]

Csv looks fine.

[Yves]

I'm wondering why the cam signal is just a line and not a tooth signal (saw tooth).
I'm using a polled cam wheel.

[billr]

Sawtooth? I would think you would be expecting a square-wave. Regardless, it used to show a square-wave with a "half-moon" cam wheel, a couple of years ago, but TS was changed. If you really want to see the square-wave, you can set "Ignitions options" in TS to "log crank/cam". The engine won't run (I think), but the log produced will show you the wave-forms you are expecting.

[Yves]

I meant square wave. Sorry for using the wrong term

I do not want a square wave i'm just wondering because that is what the cam sensor puts out

[jsmcortina]

Have you read the description of the loggers in the manual?
http://www.msextra.com/doc/pdf/html/Meg ... 3-302.html

James

[Yves]

Yes, I'm not sure what you're pointing at here.

[jsmcortina]

"Most ignition modes only listen for a single "edge" of the input signal and the composite logger will reflect that
with a series of vertical lines for each input pulse. "

James

[Yves]

ah ok, thx

[billr]

Does that mean the change a couple of years ago was to MS firmware, not TS? Just curious, no problem.

[jsmcortina]

What change?

James

[billr]

Previously the comp logger would show a square-wave for the cam, when using a half-moon. At some point that changed, now showing just the "pulse". At the time of the change I posted a query but didn't get any clear response, was advised to just use the ignition-mode logger if I really needed to see the square-wave. I didn't, it was curiosity even then, so I dropped the subject. Do you want me to search for that old thread, to pin-point the date better?

[jsmcortina]

Go ahead.
I'm not aware of any change.

Mostly it is a "display issue" of how TunerStudio shows the available data.

James

[billr]

I think this is the old thread I am thinking of:

msextra.com/forums/viewtopic.php?f=100&t=50515&p=369169&hilit=square+wave#p369169

Unfortunately, it seems the log files that were attached are no longer there. Let's just drop it, it really isn't a problem.

[Yves]

Since I'm having a sync issue (number 2). Why is the missing tooth not showing as a long tooth but as one that has disappeared ? Is this normal ? (Hall sensor BTW)

[grom_e30]

can you post a log of the sync loss as the first one does not lose sync.

[Yves]

I will make a log up to the sync loss as this is apparently a possibility in TS. However I'm currently making some wiring changes which hopefully have a positive effect (put all 5V sensors over the MS to ground, currently the are grounded on the main ground line from the relay board to the engine)