Did something stupid...put 6 gallons of E85 in my Mustang with stock Ford Performance Power kit tune

[K4fxd]

good luck with that. Flex tunes are iffy at best.

I've been working on flex tunes for several years now.

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[ZXMustang]

Why can't someone just copy and paste the entire flex tune from an F150 and then tweak it for use on a mustang 5.0? Then you would have a true flex tune.

Thats what they did. But not all the tables carry over. But that was done years ago, which is why you have flex tunes now. Shitty ones, but still flex tunes.

 

[K4fxd]

Why can't someone just copy and paste the entire flex tune from an F150 and then tweak it for use on a mustang 5.0? Then you would have a true flex tune.

Not all parameters are mapped out, at least with HP. PCMtec has them mapped out but there is a question if all parameters are live in the mustang cal. I know on gen 2 even using PCMtec I still have many parameters that do nothing.

I thought about just flashing the complete F150 OS but unfortunately for us the truck is speed density. Still might try it if I stumble on a cheap ECU.

 

[engineermike]

@ZXMustang as k4fxd mentioned, all the stuff needed to run flex on a mustang is there. Hpt just doesn’t let you see it. Pcmtec gives you access. The fuel line volumes prevent it from maturing too early and they are defaulted to zero on a stock mustang. I had the early maturing issue as well but solved it. There are also ffv cold start parameters in pcmtec that hpt doesn’t give you access to.

 

[shogun32]

given that i have to get E and 93 at 2 spots

I don't understand your rationale for "trusting" the E out of a station but runaway from their 93.
This list may be out of date but have you consulted it for "good" gas of both types being co-resident?

https://e85prices.com/missouri/kansas-city.html (zoom in)
http://e85locator.net/State Pages/MissouriE85stationlocations.html
https://www.e85vehicles.com/e85-missouri.htm

 

[I Bleed Ford Blue]

I don't understand your rationale for "trusting" the E out of a station but runaway from their 93.

Good point

 

[Jjmoberg]

I don't understand your rationale for "trusting" the E out of a station but runaway from their 93.
This list may be out of date but have you consulted it for "good" gas of both types being co-resident?

https://e85prices.com/missouri/kansas-city.html (zoom in)
http://e85locator.net/State Pages/MissouriE85stationlocations.html
https://www.e85vehicles.com/e85-missouri.htm

Fair point. And i did think of that. I guess Im hoping that if it tests around 70% or whatever routinely at least it has the knock resistance. I also read some threads in various places about people feeling there 93 was shitty. Hard to say..

 

[Jjmoberg]

I don't understand your rationale for "trusting" the E out of a station but runaway from their 93.
This list may be out of date but have you consulted it for "good" gas of both types being co-resident?

https://e85prices.com/missouri/kansas-city.html (zoom in)
http://e85locator.net/State Pages/MissouriE85stationlocations.html
https://www.e85vehicles.com/e85-missouri.htm

The Caseys 3 miles from me is the closest E85 by far. Theres one at a truck stop type station about 10 miles away. They dont show up on the 93 list though.

 

[shogun32]

The Caseys 3 miles from me is the closest E85 by far.

You can't tell me you can't find a Casey's across the street from a Conoco or 66

 

[Jjmoberg]

You can't tell me you can't find a Casey's across the street from a Conoco or 66

LOL. Youre right. But only the brand new ones around here have E85. I fill my work fleet Equinox at any random gas station anywhere. I use a lot of Caseys and QT. The Caseys by my house is maybe 2 years old. The old caseys dont have it. I have 2 more about 5 miles from home and neither one does. The old ones dont have 93 either. Caseys bought about 14 Minit Marts in the KC area and i havent found one of those with E85 either. They all had 87/89/91 in their previous life. And still do.

 

[Jjmoberg]

You can't tell me you can't find a Casey's across the street from a Conoco or 66

Also 93 is very uncommon in KC especially on the MO side. Theres a few. But not many. My suburb used to have 0 stations with 93. Now they have 1. There are less than 5 in Independence and less than 5 in Lees Summit. So the combo of one of the 3 stations with E85, and one of the maybe 10 stations with 93 within 15 miles of my house, being close to one another isnt as likely as you would think.

 

[WildHorse]

Relying on anything other than a ethanol sensor is just stupid.

 

[SheepDog]

I guess the next question then is given that i have to get E and 93 at 2 spots will this happen again on the factory tune if i put 13 gallons of 93 in and drive to get 2 gallons of E85…? Or will it mix into both tanks after the E fill?

just get an E85 tune. It will also come with a 91/93 octane tune.

 

[ice445]

This is normal.


Another problem with the split saddle tanks. Since you didn't top off all your E went into the driver side tank. A flex tune would solve this.

I've never tried adding E without also filling the tank.

Thanks for posting.

This is definitely what got him. You won't get a good mix between tanks unless you add the E first when the car is near empty. The transfer is slow between the two.

 

[Jjmoberg]

I added 6.8 gallons of 93E10. I have driven about 20 miles. Engine light hasnt gone off yet. Will a lean code clear on its own after some drive cycles or should I go get it cleared with a scan tool? If the E85 mixed well after i added almost 7 gallons i should be around E19 now.

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