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Tim D

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Tim D last won the day on November 18 2018

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About Tim D

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  1. Tim D

    TP / Idle control

    Thank you for the suggestions, much appreciated.
  2. Tim D

    TP / Idle control

    I've lived with a weird idle control situation for some time and decided to capture a log to see what's happening. When driving 'normally' and coming to a standstill, occasionally the engine speed will suddenly jump up a little. It's no big deal, I'd just like to resolve it. It appears that despite AP being at zero, the TP jumps up for some reason. See screenshot, tune and datalog below: Screenshot: https://drive.google.com/file/d/1AXVKoc_vjqeM8Qq-3aWgT_zJsY37zymf/view?usp=sharing Tune: https://drive.google.com/file/d/14fVHTdeCB9rt0rWP9-6zm887joFViK-H/view?usp=sharing Log: https://drive.google.com/file/d/19VgWmXtzkCxHAdn5JETEF13VTIuqy5xd/view?usp=sharing Any help would be appreciated?
  3. Tim D

    dashboard arduino

    There's lots of ways of achieving what you want and I am happy to share my approach which works well. I stream 56 bytes (7 frames) from ECU to dash, then broadcast this data over bluetooth (if laptop is running, the data is logged). I'm guessing you don't have other CAN devices on the same CAN bus as your dash? In this case, the concept of priorities is not that relevant (there won't be any other CAN traffic to contend with). In my MBED dash, I stream 7 frames all on the same CAN ID of 1300 (arbitrary ID). These byes are streamed 'end to end' (as observed on oscilloscope), leaving a lot of time after the last frame to do my processing. All that's required is to write your arduino firmware to recognise the stream. My dash also broadcasts the data wirelessly to my laptop, giving error free datalogging (I chose to stream this at 10 Hz). You are welcome to look at my CAN setup: https://drive.google.com/open?id=1pjCW7otZjlRO3j8JqtsJj-2yhvleHtnw
  4. Tim D

    dashboard arduino

    Hi, I made a simple dash using an MBED, so there's a lot of similarities I guess? I ended up getting a Picoscope to look at the CAN signals, great for debugging as it decodes the CAN data. Possible ideas you could look at... Can you receive and process the CAN data at 50 Hz? Maybe start at a lower rate ? Have you set the CAN ID in your code to match the Link ID of 1000? For some reason, I found that a CAN speed of 1 Mbps worked best (maybe an MBED timing thing!). During debugging, CAN data such as Gear postion could be useful as you already know what the result should be and it's static. Not sure if any of this helps :-)
  5. Tim D

    Closed loop boost control

    Thanks very much for the detailed response. 1. Your assumption was correct, I was learning the track. Good point about the wastegate DC table, I had previously spent a lot of time tuning it, but more recently, had to adjust the WG actuator as I think the spring had relaxed over time. My original method of tuning WG table was to set the AP/TP table to limit TP to 70%, 80%, 90% etc to precisely target the relevant rows in WG table (does that make sense?) 2. I will review WG table as you suggest. All your other suggestions make great sense - I will do some more tuning..... Thank you
  6. Tim D

    Closed loop boost control

    Thanks Adam, here’s a tune and log that works well on the road… 788.pclr https://drive.google.com/open?id=1pjCW7otZjlRO3j8JqtsJj-2yhvleHtnw 788 (On Road).llg https://drive.google.com/open?id=1zBqW645IBygLo8KAn92o901FGIpFjJYn But not so good on the track… 788 (Brands Hatch).llg https://drive.google.com/open?id=1LQvNR99bBTaqN-AVhe5ytYShSjByVNMp A few major tweaks to bring it (sort of) under control… 793.pclr https://drive.google.com/open?id=1e86d4wXrepp3DSImjCoY2RQhGgPd0zeO 793.llg https://drive.google.com/open?id=1WyUPMAdXe0I20CgvfD8J26by-ut3XzDE Note, if you search for the Percentage FCut (%) this is where boost exceeded my engine protection limit. Comments welcome (any part of the tune)… I think fuelling is good, but have limited experience on what’s good and what’s bad! Thanks Tim
  7. Please could someone comment on my closed loop boost control dilemma on my Subaru Impreza STI with GTX3076r turbo. I have tuned the various parameters including PID setting to give excellent control, the MAP and Target boost agree to around 5 kpa and remain extremely stable. This is all carried out on the road and pretty repeatable! A dyno session gave similarly good results. However, during a track day, after only a few laps, the boost control requires attention to prevent overboost and oscillation. Has anyone else experienced this and what approach should I take to achieve a setup that's good for both road and track? Note, I can't upload attachments, but I'm thinking it's a fairly generic query?
  8. Tim D

    Internal logging issue

    Interesting to hear that a few others have experienced the same problem. I will email tech support as Adam suggests. To add to my previous findings, I believe logging always works properly (rather than it failing to log for a period of time, which could easily be assumed), it merely gets erased. Brad, you are spot on with your assumption. To elaborate, I've configured CAN2 to stream 'Log Memory Use' and configured my Dash to 'flash at me' if 'Log Memory Use' < 5%. I designed the dash myself so have complete freedom to configure it as I wish, but I suspect the ECU could be configured with some conditional logic (I've never tried this) such that any dash could display the info? I was going to attach my .pclr but get the following message: You are only allowed to upload 81.92kB Can someone at Link help resolve this please?
  9. Tim D

    Internal logging issue

    Yes I believe there's a bug too. I have a custom dash that I've configured to flash at me when Log Memory use is < 5%. Therefore, when the memory becomes erased, it flashes at me and I know the instant it's become erased. It must have happened to me over 20 times (in 2 years) and every time, it's when starting engine, as confirmed by the subsequent internal log file always starts with ECT showing 'cold'. Should it have become erased right at the end of the previous engine running time (not during starting as I suspect), the ECT would have shown 'hot'. I don't have a log file to hand, however, the resulting new logs have always looks completely normal. The only part I'm not 100% sure about is, whether the erasing takes place during Key-On or Cranking. Hope that all makes sense!?
  10. Tim D

    Internal logging issue

    I log memory use (as suggested by Ducie54) and this has exposed a problem with mine whereby logging appears fine, then occasionally, it will become deleted. Very annoying.
  11. I expect the fuel cut status will become active after the ignition retard has reached its target, hence my suggestion of letting car overrun for longer. I'd say give it a go... :-)
  12. Hi, I think it's working, as seen by the ignition trim, but it looks like the ECT is stuck at -30C for some reason. I tried uploading a screenshot but it was rejected for being over 81 kB You could try letting car overrun for longer, above 1800 rpm. Hope that helps.
  13. It looks like the wastegate duty cycle table needs tweaking first, it doesn't look very tuned?. The I-term is having to do a lot of correction to maintain steady boost. Once it's tuned, the PID terms will have less work to do and it should make tuning a lot easier...
  14. I have had similar experiences to this. In my case, the internal log file has self-erased, as indicated by the parameter 'Log Memory Use'. I can't explain it.
  15. Tim D

    New ECU has died

    Thanks all for your help guys! It turned out to be fuse number 11 in a fusebox I didn't know existed! Hidden away behind the immobiliser keypad, which you have to pull off it's hinges to reveal the fuses. Apparently this fuse feeds Engine ignition system and SRS airbag. It pretty much immobilsed the whole car! Not sure why it blew, perhaps I have an underlying fault that will come back to bite me! Thanks too to https://shopbhp.com/ - great tech support as always
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