CAM trigger loss of sync.

[B1ack_Mi16]

Having a problem with my CAM sensor, which I believe is the reason I had problems starting the engine.

Had set it up with COP and had lots of problems. Changed it for Wasted COP now, and it actually started after some fiddling in the software.

But it has a red light on the CAM sync, and looking at the log it seem like that sometimes it does not really register that the tab passes the sensor.

I have wired it like this
Pin 1 - +12v
Pin 2 - signal to ECU
Pin 3 - Signal Earth ECU

This is the type of sensor btw; http://www.ebay.com/itm/PEUGEOT-206-1-4 ... Zy&vxp=mtr

It is OE fitment and all hardware is OE, hence I had thought it should just work out of the box.

However I found this diagram somewhere, indicating the need for some resistors in the wiring? Does this apply to the MS3 Pro also?

CAMSENSOR_PETERT.jpg

I think I'll just try to change the sensor itself first, but if anyone got a clue about why the resistors are added in the figure above, I would be glad to get some info regarding the matter.

[B1ack_Mi16]

I have one additional question.

The CAM sensor, when should it actually be triggered?

My Timing is 115 deg 60-2 setup amd that hits exactly at true TDC.

Do I need to make the CAM sensor trigger 115 degress + some extra margin before the CYL1 is going to fire?

[Matt Cramer]

Please post a copy of your MSQ and a composite log of the cam error - this will tell us more about what the MS3-Pro "thinks" is going on.

[B1ack_Mi16]

Ok, yes I guess I should've attached a file or log.

However, not convenient to transfer from the PC in the garage just now, but I did take some screen shots.

Anyways, I think I might have set a setting in the trigger setup which stated that engine should turn 2 rounds before it starts igniting/injecting.
Changed it to 3 as that seemed to be the recommended setting.

Also swapped the sensor, but don't think that actually made a difference, but I added some software filtering to it that I found in the Tunerstudio menu.
And in the end I think it worked out. The composite logger is like this now:

Does this mean that the CAM sensor triggers actually just before it has to? (before the space in the 60-2 crank trigger, so I don't need to worry anymore about the actual physical orientation of the thing that rotates with the camshaft?



The previous screenshots were like this, and did not look very regular at all:

[B1ack_Mi16]

Sadly the problem wasn't fixed.

It seem to be a bit random if it get CAM sync or not. However if it does in the beginning all seem ok, even though the logged data does not look good (not as the first pic I attached yesterday).

Does it only need the CAM signal once at the very beginning? I could guess so as long as the Crank signal is stable?

Here is a link to my CurrentTune file: https://drive.google.com/open?id=0ByGjL ... W51RURBM1k

And a small portion of log: https://drive.google.com/open?id=0ByGjL ... Ho1SVVTVm8

[Matt Cramer]

Yes, in dual wheel with missing teeth mode, once cam sync is established the MS3 stops listening to the cam sensor as long as it has crank sync.

That looks like setting the second trigger active edge to "poll level" would ignore a lot of the noise.

[B1ack_Mi16]

Ok thanks.

So if I select Poll level instead of rising edge.

What shall I use for the "Level for phase 1" setting? Low, High?

The same goes for the "Check at tooth#". Shall I set it to about 120 degrees or something, considering the timing is 115 and the CAM sensor trigger close to that?

[jsmcortina]

I'd set it to 1.

James

[B1ack_Mi16]

Added two 2.49kOhm resistors (just because I had them lying around) in parallell between +12v and ECU signal, and now it has perfect CAM sync signal using the rising edge setting