haybusa ref /sync capure

[Scott@FP]

How close is the sync sensor and its wiring to any ign secondary component? That's a nasty spike.

[harky]

The sync loom is near the feeds to the cop s looms
I will separate all that and see what sort of " picture " I get
It is all meant to be simple , the runs from the ecu are so short
All part the the fun !
Harky

[Scott@FP]

Also make sure the coils aren't connected to eng or aux 0v unless they are 4 or 5 wire and you know for a fact they require sensor gnd. Usually they don't, there's a gnd for the secondary winding, and one for the primary neither of which go to sensor gnd or extreme spikes in the 0v occur.

[harky]

Thanks for your input Scott
I need to re look at my wiring
( it is a Motec unterminated loom )
The Ov and earth " Confuse " me !
I have also connected a wire to the shielding of the sync loom and earthed that. ie terminated @ the sensor mounting bolt Is that good or wrong ?
Some times old mechanics shouldn't be allowed near wireing! By that I mean Me !!
Harky

[Scott@FP]

Shielding should be grounded at one end only, to main power gnd (pins A10,A11) at ECU end. It can act like an antenna so hooking it up to any sensor 0v or at a sensor is not a good idea.

[harky]

Ok I'm back
Still no sync
I have " un terminated " the shielding @ the sensor ends
I have moved the sync loom away from the regulator and coil loom
I have disconnected the 8 v supply that was " live" in the Motec loom to both ref & sync sensors ( there is a lesson to be learnt there )
I still have the same SPIKE. As you see in the captures I have put up
I alternate between mode 5 and 69 , as others get 5 to work ok with the same engine
Fault screen is often. No sync
Here is something someone might explain
When I set the ref to rising and not falling the spike is not there !
I have done it a couple of times with the same result
I had one cough from the engine. That was exciting

Ok. There we are. And for all the northern hemisphere advisers. it is 40c outside and 55 c in my workshop
The fan makes me feel a little better
Thanks for any advice
Harky

[AlanB]

Send your ECU file to us and we will have a look at it for you. The email address is support@moteceurope.co.uk.

Regards, Alan

[harky]

update
I have been on another project and am now back to my Hayabusa

I installed a " brocks" offset cam pin ( gen 1 and gen 2 busa s have different cam settings , the offset pin for the cam sensor counteracts the difference . the std pin is 5mm the new pin is 8.5 mm
So my thinking was this will " separate " the signals more allowing me to better use mode 5 !
no joy , no sync , I have very accurate crip !
what is clear is many people using this engine ( with after market ecu s ) have a similar problem
there is hall sensor replacement kits for the original magnet sensor , an early model gsxr ( 07) has a hall sensor that fits the Hayabusa
Ok , this is different , I reset the crip 360 deg less ( which means the cam pin is 180deg different ) and repositioned the plug leads ,
So no 1 and 4 cyclinders are on tdc , 1 is on comp ,the crip is set for 4 to be tdc com , so I switch plug leads and the same for 2 and 3 that really separates the ref / sync signals !
my explanation is a bit hard to do put into words

engine starts and has sync , with no errors after a short run time
I will take more captures and look @ the filtering etc

From all this I have decided i will fit an hall sensor to the cam , as others seem to do
and of course revert to the " right" crip etc
Hope some of this is useful to anyone using a gen1 hayabusa

now for sensor calibration , and some dyno time
cheers
harky

[harky]

I have ment to update this story , should have done it months ago
i did all the previous things and ended with the same result.
engine starts ---stops and shows ref / sync fault
no question I and the people helping me are missing something

some will find the result funny --- it is but also very frustrating
when i checked things ie ---- start and look @ each setup setting
i had a non specific map sensor , with very fine scaling ( to 1.05 bar ) , but could not do the pressure side accurately enough so set it to 0 (zero) meaning delisted it for the time being ,
in that process it looks like i. input. -0 look carefully @ the minus before the number zero
remove the minus sign and the engine goes
not sure how this occurred, but easily missed when looking @ the settings !
so it seems when the engine starts it then sees the - amount for map correction and does exactly that to the fuel
may be others will get a laugh from this but on a serious note it may be helpful to someone

i have since run the bike @ a land speed event and am continuing to learn and adjust all things associated with the M84
have found that16 logged items is easy to fill , more would be useful , anyway that's how it is .
bit late but update done
harky