So I have decided to switch to E85 since the new combo has a bit more compression in it. Here is the skinny.
418ci motor
13-1 compression
TSP 237 heads
254/260 cam
Super Vic Intake
4150 plate
4150 to dominator adapter
Dominator TB
Edelbrock 1 3/4 stepped to 1 7/8 headers (will swap out at some point)
Prior to this new combo, I had AFR 225's (11-1cr) and a 245/260 cam in it. I have always run that combo with the IAC hole plugged. Cold start always required 2% throttle via turning the idle screw on the TB. As it warmed up I was able to bring it down to 0% TPS.
I fired it up on 91 on Friday and Saturday just to check for leaks etc. I did my idle screw trick and no issues.
I switched to E85, added roughly 40% fuel and fired it. It would not hold idle and I spent 30-60 minutes in nuetral adjusting AFR getting it close to stoich (14.7). I know, I am still tuning with the gas equation and will eventually switch over to Lambda.
After getting the AFR closer to stoich, it will run on it's own (even though it is a bit rich with no throttle and a bit lean with throttle, still needs work). But I can not get it to idle down from almost 1,900rpm.
I have check for vacum leaks. I plugged the factory fitting on the valley cover going to the throttle body spacer to help with crank case pressure just to see if I was getting too much air through it. Again, the IAC hole is plugged so no leak there.
Attached is my tune, .cfg and a short log.
Any help, ideas, info would be great.