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therealkeal

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  1. Thanks Adam, you could be right actually because it seemed so out of the ordinary. It is only a pretty cheap scope. I might just press on and see if I can get timing set over the weekend. Appreciate it.
  2. Hey Adam wondering if you can shed any light on this??
  3. Long time between drinks, have now changed the crank wheel over to twelve teeth, a new problem emerged that I didn't expect. Have a lot of noise on the crank trigger which wasn't there before, nothing else has change though. It's a bit intermittent. I'm planning on replacing the crank sensor, and rewiring to bypass the factory wiring incase it's aged. Anything else I should check? When it does work I finally have zero trigger issues and stable rpm.
  4. Thanks Adam, really appreciate it, have got a bit of work to do and see what happens in the coming weeks.
  5. Any thoughts on the above regarding trigger wheels?
  6. The starter clutch could be slipping I suppose. I only replaced the starter itself. It's a pretty big job but while I'm doing the clutch, I will have access to the Crank Trigger wheel, I could theoretically make changes to the trigger wheel at the same time if you think the ECU would prefer a different configuration. Would 36 teeth none missing, or 36-4 be more reliable? I've got a spare trigger wheel I can modify. I was reading an earlier post in this thread that 36 with none missing could be better because the ECU doesnt look for gaps? (which seems to be the root cause of the issue with this engine given the variable cranking speed) I also noticed that blip on the scope, though it only happened once, will try cranking with the coils unplugged.
  7. Any thoughts on the above? Appreciate the help..
  8. Heres a link to the data from the scope https://docs.google.com/spreadsheets/d/1fjRY90KhYJ8BR8v4pNoCZzlIDGGs6pJd/edit?usp=sharing&ouid=106553184062656533192&rtpof=true&sd=true I couldn't get all of the data for both triggers into one CSV, but let me know if you want the rest of the data for the cam trigger. But that doesnt look like the problem.
  9. Here are the files from the oscilloscope. Still not getting consistent timing. Have done a couple cranking just off the battery and with jumper leads to try and get maximum rpm.
  10. Have tested the sensor, getting 4.6V open and 0.02 touching, around 0.3V or lower when right next to it. Haven't got an oscilloscope yet. Didn't have my laptop handy to log it cranking, but looks like the sensor itself is working OK. Assuming I'm still getting the same issues, what options are available to me? I feel as though I've tested every trigger setting available. Will report back when I get the oscilloscope onto it.
  11. Ok will try to get my hands on an oscilloscope. Would be so much easier if this ECU had the scope, it's a real early model by the looks. The CAP sensor has a 12V supply, and I have one pos sensor wire and ground going to sensor ground. I've attached the wiring diagram of the sensor if you dont mind taking a look, just to check I've not done something wrong. I've tried reversing the pos and ground sensor wires and it definitely doesnt seem to work in that configuration. CAPS Testing Seadoo Manual.pdf
  12. The other thing that seems incredibly odd is, I had the ignition offset at -300BTDC and the timing seemed to be right (this matches what it should be according to some base maps I've found), then coming back to it a week or so later, I had to set it to +60BTDC to get the timing to fire correctly. The timing is off a mark on the Camshaft pulley too, so it should only be one ignition per rotation, so it physically cant be 360 degrees out as if I was doing it off the crank. Is there any explanation for why the ECU would do that? I double checked that all of the settings were the same from an earlier saved map and they were. If I go back to -300BTDC the timing is way off.
  13. I think I'm starting to run out of things to try with these trigger issues. Have replaced the starter and tested using a jumper pack to keep the cranking voltage up. Tried a number of different filters on triggers, still getting inconsistent RPM and trigger errors. Is there anything left to try? When it is reading the RPM correctly I'm getting ~400RPM which I think is all the starter can do. Cranking - Strong battery.llg Cranking Strong Battery 2.llg Cranking Strong Battery 3.llg
  14. I've tried again with starter fluid, and a number of attempts with more fueling, different injector timing. I'm more and more convinced I'm getting trigger issues, today I was barely able to get stable RPM unlike the other day. It seems incredibly hit and miss, particularly when starting with fuel. I am getting a couple of attempted fires and kickbacks. When the plugs are out the timing is bang on and no errors. When they are in it seems to be all over the place. Do you guys mind taking another look? Start attempts 27-8.llg Log 27-08-22 8;46;24 am - plugs removed.llg Seadoo GTX Rotax 4tec NA - Saved 27-8.pcl
  15. That's a relief. They are the stock injectors, I think around 370cc, but the base map was for 1000cc, the fuel trim was 6ms, so I increased to 12ms to account for the smaller injectors. I did try some starter fluid but it seems to result in huge backfires, I suppose I could try it again. Its so odd its like the timing is out but I've double checked the base timing and its bang on.
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