E85 or 100 octane

[EcoPowerParts]

All the transverse have the same fuel system.

[Josephm]

2013 and up SHO got the upgrade fuel pump correct? I was searching for a part number last night for new fuel pump

[wasinger3000]

Found out the car won't start on e30 with the stock tune... hah.

[SHOdded]

Interesting!  A defensive mechanism or simply too much octane for stock tables?

[EcoPowerParts]

Found out the car won't start on e30 with the stock tune... hah.

Do you have a 3 bar sensor, cause it won't start with that installed either...

[Boggus]

Mine will start with a 2bar tune and the 3 bar map installed.  Just doesn't like to idle smooth

[wasinger3000]

Found out the car won't start on e30 with the stock tune... hah.

Do you have a 3 bar sensor, cause it won't start with that installed either...

Yeah that too. Hah. So I guess I better keep that 2 bar in the trunk just in case.... This ecm is such a baby!

[wasinger3000]

Also tested some 91 fuel that I filled up with last night. It has 0% ethanol in it. Which is weird cause its the same price as 91 with 10%. Not sure if that's good or bad since they use a lower grade base to make the 91 with 10% maybe this is better since it's a true 91? Idk. I guess I need some way to test octane.

[FoMoCoSHO]

Found out the car won't start on e30 with the stock tune... hah.

Something is not right there. I've been well over 30 with no issues. Even At that blend there's plenty of pump gas to get the party started.

[EcoPowerParts]

Found out the car won't start on e30 with the stock tune... hah.

Do you have a 3 bar sensor, cause it won't start with that installed either...

Yeah that too. Hah. So I guess I better keep that 2 bar in the trunk just in case.... This ecm is such a baby!

The intercept and slope is different on the 2 bar vs the 3 bar, it's getting different pressure readings than actual readings, that's the problem.

[wasinger3000]

Found out the car won't start on e30 with the stock tune... hah.

Something is not right there. I've been well over 30 with no issues. Even At that blend there's plenty of pump gas to get the party started.

It's the 3 bar sensor then. I was very skeptical about 30% keeping the car from starting.

Only thing is I had to drive 5 miles home on the e30 tune with just 91 in the tank. Which I was not happy about. I made sure to keep the boost down as much as possible.

Next time I'll have to just bring the e85 with me to the station. 

[wasinger3000]

Found out the car won't start on e30 with the stock tune... hah.

Do you have a 3 bar sensor, cause it won't start with that installed either...

Yeah that too. Hah. So I guess I better keep that 2 bar in the trunk just in case.... This ecm is such a baby!

The intercept and slope is different on the 2 bar vs the 3 bar, it's getting different pressure readings than actual readings, that's the problem.

That explains that! It's nice to know it doesn't work because of me and not itself being weird.

[EcoPowerParts]

I banged my head against the slope/intercept scenario to try and get the 3 bar to work on the Flex when I was trying to learn how to tune it myself. The solution was MUCH easier than I had realized however.

[SHOdded]

Good info, all!

[wasinger3000]

This is a good read. Shows the octane rating of different E blends as well. http://www.energyresourcefulness.org/Fuels/refineries_and_octane_levels.html