Syvecs Forums

Wheel looks straight

I'll get a scope on it and see whats happening - I've no reason to suspect Syvecs is misreading - guess it could be a weird loom issue.


Not so much that it is misreading persay...but just in case there is an oddity with the sensor plugged into the loom vs not plugged in ...

Can you get a proper oscilloscope trace of it ? Seems very weird. What input are you using ? Has it ever worked correctly ?

Can you get a visual on the wheel at all ?

If the wheel is sound and true, what about a hall sensor ?

But a proper scope of it, showing all voltages might yield a little ...

You need to log more suitable information, relFp, fuel pressure trip thresholds etc. Also without a Cal, cannot see any timings and setup that will force that limp mode.

If your fuel pressure sensor etc is calibrated correctly, then it seems very odd. Running only around lowish 2's bar base ...

And as far as idle is concerned, if it needs more air, just give it more air.

I would tend to run the idle valve as close to closed as possible, and use the throttle blade itself to get a good solid base idle. Then the idle control only ever needs to pull the idle down.

Less work to do, less ...

It may be getting into sync, but again, that cam waveform is rising edge. It cannot be configured as falling edge.

the cam trigger posted is a valid and usable trigger. There is no reason to change it.

Everything just needs configured correctly.

save and upload the syncscope file, not enough detail in the images. But a loss of crank trigger can be many things, as simple as voltage thresholds, interference, or a bigger problem.

A suitable crank trigger will allow running in 360 only. It is the cam trigger that tells the ecu where cyl1 is ...

On the sync scope it keeps repeating 0-360.

Or on the main SCal screen when cranking, you'll see in the top right corner.

Depends how you have it configured, it can start in 360 or not. But it needs full 720 sync for everything to be correct.

Your cam waveform is clearly rising edge. Other option ...

Yes the crank has a missing tooth, that's good. Yes green lines are good, although it does not appear to be into 720sync

The way it's wired looks like crank will end up falling edge, but cam rising edge. Crank probably a 36-2 ?

As for any positions relative to TDC you'd need to sort that yourself ...