234Fpv Donating Members 522 Member For: 12y 9m 10d Gender: Male Location: Yeppoon qld Posted 23/09/11 12:17 PM Share Posted 23/09/11 12:17 PM Sounds a bit dodgy. Is it something to do with the xcal? Sounds pretty common..Sent from my HTC Desire using Tapatalk Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 18y 6m 27d Gender: Male Location: Perth Posted 23/09/11 02:07 PM Share Posted 23/09/11 02:07 PM The ford Pcm's need and 18volt signal to the FEPS pin to kick them into programming/flash mode.The X-cal uses some electronic trickery to bump the voltage up for 12.5/13 to 18 but if the battery is a bit weak its can be a struggle to maintain the 18v signal.Its a good idea to turn off all accessories (AC/interior light.etc etc etc) when flashing as it reduces the load on the battery and helps keep the voltage up Link to comment Share on other sites More sharing options...
Timmy-XR6T Silver Donating Members 179 Member For: 14y 8m 6d Gender: Male Location: Sydney, Inner South Posted 27/09/11 04:36 AM Share Posted 27/09/11 04:36 AM (edited) got the same issue, wasnt keen to put it back to stock straight away so might start it up, let it run n charge the battery for a bit and then try to reflash.my x3 is only 2 weeks old and the car about 12 months old so hopefully things dont break that quickly. Edited 27/09/11 04:36 AM by Timmy-XR6T Link to comment Share on other sites More sharing options...
Timmy-XR6T Silver Donating Members 179 Member For: 14y 8m 6d Gender: Male Location: Sydney, Inner South Posted 27/09/11 06:12 AM Share Posted 27/09/11 06:12 AM scratch that - I cant even go into the custom tune folder without it telling me about the failed download - looks like it will have to go back to stock and then back to custom - have put a call into my tuner just to double check - dont want to frack anything up. Link to comment Share on other sites More sharing options...
astroinc New Member 23 Member For: 20y 1m 13d Posted 18/10/11 05:25 AM Share Posted 18/10/11 05:25 AM I tried mine a few days later and I was able to load back to stock, then tried loading the custom tune 30 minutes later and it worked. I think it could be a voltage thing I turned off everything I could even turning my phone off to stop bluetooth connecting (SCT talk about pulling fuses). When the load failed the first time, the bluetooth was trying to connect to my phone. I also heard you need to give the ECU time to adjust between flashes around 30 minutes. Whatever it is it seems common with units purchased in the last few months. I think I have a boost leak now only at the higher end of the psi range, just need to find it in the fg. Link to comment Share on other sites More sharing options...
Hubber New Member 14 Member For: 5y 4m 15d Posted 24/04/20 10:00 AM Share Posted 24/04/20 10:00 AM Old thread but I had this issue tonight, I removed the phone charger and aux cable and it finally worked, hope this info might help somebody👍 Link to comment Share on other sites More sharing options...
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