I have a 2015 Mustang with the Hellion twin kit. Car was originally dialed in on pump gas and then a return style fuel system with fuel rails was added and switched to E85. The tune stayed pretty much the same besides stoich value and timing when switching to E85.
Since the switch to E85 the car will not start once it gets hot. I can make some WOT pulls and cruise for a few minutes to let the car cool. I park and turn it off. If I wait 5 minutes or so the car will not start. I will then need to pop the hood and wait 15-20 minutes before the car starts. When it doesn't start it just cranks over and over. Doesn't even attempt to start. I can do that several times. But when it finally starts it starts up like nothing ever happened. Doesn't spit, studder or slow start...
I dont have a log in VCM Scanner of this doing this. The log shows that it gets no timing when it wont start. The timing will stay at -2 or so instead of the 3 degrees or so when it cranks and actually starts. I've tried some changes to the cranking spark act vs ect table with no luck.
Weird part and maybe a clue, if I re-flash the computer with the same tune it will start up just fine even if I don't let the car cool. Is there some switch or table that is an overtemp protection of sort?
Thoughts? I can post a SCT log if someone wants it and I will try to get a log with the VCM scanner soon. I know its frowned upon but I probably wont post the tune since its not really my tune and was dialed in from another tuner. I can check and post certain tables if needed though. THANKS!!!