alecmorris Posted March 16, 2014 Report Share Posted March 16, 2014 I'm new to this forum , just bought a 2012 Ossa tr280i , not really happy with the engine feel in bottom end and it keeps on flooding. So I'm trying to understand how the FI system works , I understand FI but I don't get how the Ossa does its calculations , my MAP sensor is In the outside air not the manifold , so is the amount of fuel dependent on the throttle position? (With some tweaks for engine temp etc) so the map sensor is only monitoring the barometric pressure ? Quote Link to comment Share on other sites More sharing options...
canada280i Posted March 16, 2014 Report Share Posted March 16, 2014 Is it mapped current. Is the TPS sensor set correctly? Quote Link to comment Share on other sites More sharing options...
alecmorris Posted March 16, 2014 Author Report Share Posted March 16, 2014 Don't know what map it has or if the TPS has been set with the software , Quote Link to comment Share on other sites More sharing options...
canada280i Posted March 16, 2014 Report Share Posted March 16, 2014 I would start there first Quote Link to comment Share on other sites More sharing options...
dadof2 Posted March 16, 2014 Report Share Posted March 16, 2014 MAP sensor measures Manifold Absolute Pressure which is actually a vacuum. I suggest you have a word with Nigel Birkett (Ossa UK) Quote Link to comment Share on other sites More sharing options...
alecmorris Posted March 17, 2014 Author Report Share Posted March 17, 2014 Exactly the MAP should read the manifold pressure but it's not connected to the manifold (that space between the throttle butterfly and the engine) it's a barometric pressure only sensor on the ossa) MAP sensors can do both vacuum and pressure above atmospheric . They are traditionally used for barometric pressure reading before startup(takes a measurement before engine starts ) but this is not possible with the ossa without a battery. Quote Link to comment Share on other sites More sharing options...
lotus54 Posted March 17, 2014 Report Share Posted March 17, 2014 I think certainly get the new map and get the TPS set. Doing anything before that seems a bit pointless. Certainly no running issues on my 2014, but it does like a little hotter plug for around here in the cold and wet. I priced the factory software/cables- they are quite expensive. I would buy them if resonably priced- even though I have had no use to adjust anything yet (about 60 hours) Where are you located? Quote Link to comment Share on other sites More sharing options...
alecmorris Posted March 17, 2014 Author Report Share Posted March 17, 2014 (edited) I'm in Bridgend South Wales CF32, I'm going to have a go at making my own cable, £700 for a cable is twice the price of the ecu itself I work as an electronic engineer , the only problem will be if the cable is encrypted to the software and ecu somehow What is a hotter plug? Edited March 17, 2014 by alecmorris Quote Link to comment Share on other sites More sharing options...
lotus54 Posted March 17, 2014 Report Share Posted March 17, 2014 Sorry, sparking plug. I found the stock one ran a bit cold here when doing lots of idling/low speed. I recall the software/cable a lot less than that, but I'll have to find the quote I got. I do know it was way more than I want to spend on a bike still under warranty! Either getting or writing the software would be rather a challenge I think- but such things have been done before. I have a Lotus Elan that I use an application that an enthusiast wrote for the software- but really just reads what is sent. And I'll bet the info was easier to get. Heck, I still can't even get a wiring schematic! But certainly keep us posted on how you do. Mark Quote Link to comment Share on other sites More sharing options...
fantic303 Posted March 25, 2014 Report Share Posted March 25, 2014 I work as an electronic engineer , the only problem will be if the cable is encrypted to the software and ecu somehow This cable is what you need for the Ossa. It's from a friend of my who had an Ossa. Making a copy of the cable is not the biggest problem. The problem is how do you get the communication unit?? Quote Link to comment Share on other sites More sharing options...
alecmorris Posted March 25, 2014 Author Report Share Posted March 25, 2014 Great info thanks It's all depends what's in the communication box The ossa service manual shows a "signal level convertor" as the communication box If that's all it is then it's a simple device converting some signal (I.e 5v rs232 or 3.3v rs232) into the RS232 for computer This hardware I have I'm my drawer . I have been doing some tests already with Kscan software from Gas Gas website . No luck so far But if I could get the Kscan for Ossa software then there is a good chance it will work Can you help ? The owner of that cable will have the right software to go with it If I succeed in my mission I will post all the info Then we will all have the means to check our bikes with a £20-£30 cable Quote Link to comment Share on other sites More sharing options...
canada280i Posted March 26, 2014 Report Share Posted March 26, 2014 I would like to see ossa release a version of the software and cables that is restricted but affordable so that owners can tinker a little, idle etc. without overdoing it and breaking the engine. I would imagine that the warranty would be voided if adjustments were made with homemade cables. Quote Link to comment Share on other sites More sharing options...
trialtrial Posted March 27, 2014 Report Share Posted March 27, 2014 Hi Alec, if you cannot get it the Kscan software or a copy of the OSSA software, I suggest calling Nigel and see if he will be attending a competition in your area. He might be able to bring his laptop and cable and get you all sorted. I had my 2012 ECU remapped and TPS set and all problems were solved. Yours should not be flooding at all. Quote Link to comment Share on other sites More sharing options...
dadof2 Posted April 5, 2014 Report Share Posted April 5, 2014 I have known Nigel for near on 40 years and bought bikes and bits off him but until Ossa supply EFI diagnostics gear at the price of a cheap auto code reader and a £10 CD for mapping I would not even consider buying one. Call me tight if you like buts that's the way me and quite a few others think. Quite a few of my friends have had expensive enough trouble with electronic ignition failure and a move to a bike containing the "black art" of EFI is just a step too far. I am fairly competent with auto EFI diagnostics but I have little inclination for anything that is effectively "sealed off" Quote Link to comment Share on other sites More sharing options...
steveo Posted April 6, 2014 Report Share Posted April 6, 2014 I know of no electronic or EFI failures with the Ossa. The biggest problem seems to be self inflicted. That is to say owners tend to try manually adjust the idle and in doing so confuses the TPS settings. Quote Link to comment Share on other sites More sharing options...
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