Hey Guys!
Hoping to see if i can get some help-- We are tuning a 15 mustang coyote with a Roush Supercharger-- on pump gas its great-- on e85 it makes great power but it has acquired an idle hang--
you can just be sitting there in neutral and it will slowly work its way up to about 1800-2000 rpm and hang there- it will then randomly come down back to normal idle but then repeat the process back up to 1800-2000 rpm-- you can burp the throttle and it will come down but then just go back up--- JLT Intake- FIC 1000s Roush Phase 1 Kit with VMP 79MM pulley-- Literally the car runs great makes 700WHP on E85 but this is the only issue-
ONLY does this on Ethanol!
Has any one experience this before?
Appreciate the help in advance!
Trying to upload or attach a file but its not working, so i will continue to try