91 octane vs e85 in flex fuel Tahoe/suburban?

[Marky Dissod]

So, when it's cold out, in the 50s or lower, the truck stalls on the first remote start in the morning.
I take it that the E85 in the lines is really cold and doesn't want to fire. She always fires right up on the second press of the button.

It's not the temp of the E85, it's that it's too lean. ECM goes slightly richer for the 2nd start.

 

[MD-Wood]

I've pumped about 1,800 gallons or more of ethanol in my truck over the years. Many times the fuel sat for a month in the tank before the truck was refueled, often with another tank of ethanol. We've experienced no fuel system problems. Truck is at about 207K miles on her original injectors/fuel pump. We don't really have any metal in our fuel systems anymore. Do we?

Here in Florida, our E85 is about the same alcohol content year round. Or rather, my car calculates it to between 72 and 80 percent.

So, when it's cold out, in the 50s or lower, the truck stalls on the first remote start in the morning. I take it that the E85 in the lines is really cold and doesn't want to fire. She always fires right up on the second press of the button.

Looking forward to running it again but want to make the first 1/4 mile passes on gasoline as that's what my last passes were on. Soon.

I am also in Florida, The part of ethanol that causes condensate is Air. as long as your system is tight and keeps all areas filled with fuel things are good. Now the top of a steel fuel tank that is not topped off is another story. Or an engine with a leaky injector that is left sitting can be a problem.
the E85 I'm getting here is about 75%. Thats at least what Diablo Trinity2 gauges show. They seem accurate.
And most fuel system parts are coated to extend their life.
We havnt had any start issues with our 2015, it has 175k, plastic fuel tank, is run daily and we love the E85 prices down here.