Well today I spent a number of hours doing battle with the Daytona again. I have pulled and swapped the Injector rail with one from a Sprint, Swapped the Injector sub-harness, ECU and Crank position sensor for the ones from my scrapped sprint. Replaced the plugs and re-programmed the replacement ECU with a map for a 955i Daytona with sports exhaust that is also set to ignore any input from the Lambda sensor. Having done this she fired up and I then reduced the idle fuel trim. When I pulled them the plugs were quite sooty despite having only had a few minutes of running before the engine conked on me last which makes me think even more that over fuelling, especially at idle is the big problem. One thing I noticed right away when I got her running again was that the zorst has a different and less noxious smell than it did. I am wondering if this maybe has arisen because of the performance map that I wrote onto the ECU last year causing a gradual build-up of carbon when the engine was only being run at idle throughout the winter rather than getting regular long runs. Having read up a bit on what is what with these ECU maps it appears that the tuning company who developed the map that I put on has settings in it that rely on the lambda sensor being in operation to determine fuelling levels where, it seems, most modified Daytona's have map values for the same settings that stop the ECU using the Lambda sensor to determine fuelling levels. Only time will tell but hopefully, keeping the idle fuel trim settings lowered will prove the solution or, alternatively, that one or more of the the parts I have swapped over were faulty and have now been eliminated.
I suspect that the combination of the Map I got for her last year and a regimen of idling the bike for some minutes on a regular basis throughout the winter has been the real problem but a failing IACV valve was also a contributing factor. Only time will tell but fingers crossed I have got somewhere with the beggar. I am now determined to really study my Triumph workshop manual, and the Haynes for good measure, and pay particular attention to how the ECU and EFi work in detail.
Oh, for good measure I have bunged some injector cleaner in as well.
