Help - rpm drops after flashing E85 tune.

[Joyriding_86]

So like I said, after flashing e85 with oft the car is running kind of bad. Before hand I had flash the stg1 oft tune no problems, the car pulled hard and smooth. I ran the tank low filled with e85. Gave it about 20+ miles just low rav driving. And from the first drive from flash I noticed the rpm drops almost to stall when I release the clutch. And the rpm bounce around when driving and letting off the clutch without giving it gas. Ltft and stft is both between 7-/+. I did change and set the launch control to a lower rpm I don't think that would mess with the tune. Should I reflash it with stock e85 tune? Would it have to relearn e85 if I do? Should I give more time to adjust?

Thank for any advice!


Tldr; after filling up and flashing e85 car runs rough and drops rpm

[BlOody_BoOger]

Originally Posted by Joyriding_86

So like I said, after flashing e85 with oft the car is running kind of bad. Before hand I had flash the stg1 oft tune no problems, the car pulled hard and smooth. I ran the tank low filled with e85. Gave it about 20+ miles just low rav driving. And from the first drive from flash I noticed the rpm drops almost to stall when I release the clutch. And the rpm bounce around when driving and letting off the clutch without giving it gas. Ltft and stft is both between 7-/+. I did change and set the launch control to a lower rpm I don't think that would mess with the tune. Should I reflash it with stock e85 tune? Would it have to relearn e85 if I do? Should I give more time to adjust?



Thank for any advice!





Tldr; after filling up and flashing e85 car runs rough and drops rpm

Try reflashing it again sometimes the file doesnt flash correctly also make sure you uploaded the correct file specific to your cars i.d

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[Joyriding_86]

Originally Posted by BlOody_BoOger

Try reflashing it again sometimes the file doesnt flash correctly also make sure you uploaded the correct file specific to your cars i.d

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Will the car have to relearn E85? I have ran stg1 no problem before. I'll try to rewrite later today. Would the LC change have anything to do with it?

[BlOody_BoOger]

Originally Posted by Joyriding_86

Will the car have to relearn E85? I have ran stg1 no problem before. I'll try to rewrite later today. Would the LC change have anything to do with it?

You would need to let the ECU learn again, if it didn't upload properly, just drive it for like 10miles chill and see what happens


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[BlOody_BoOger]

Originally Posted by Joyriding_86

Will the car have to relearn E85? I have ran stg1 no problem before. I'll try to rewrite later today. Would the LC change have anything to do with it?

Also when plugging in and out your oft make sure the car is off. Plug in your oft and then turn the car on. If you're connecting and disconnecting it with the car running you can cause the ECU to go into limp mode.

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[Joyriding_86]

Originally Posted by BlOody_BoOger

Also when plugging in and out your oft make sure the car is off. Plug in your oft and then turn the car on. If you're connecting and disconnecting it with the car running you can cause the ECU to go into limp mode.

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Thanks, and I do unplug and plug sometime while running. I will retune and run lightly for 20 miles and see what happens. Cause if anything I'll just go back to stage 1, I felt more tq and hp in that tune.

Thanks

[BlOody_BoOger]

Originally Posted by Joyriding_86

Thanks, and I do unplug and plug sometime while running. I will retune and run lightly for 20 miles and see what happens. Cause if anything I'll just go back to stage 1, I felt more tq and hp in that tune.



Thanks

Lol if you do it correctly e85 should feel like you just gave your car an adrenaline shot. It's much more aggressive and and the the throttle response is a lot more sensitive

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[Joyriding_86]

Originally Posted by BlOody_BoOger

Lol if you do it correctly e85 should feel like you just gave your car an adrenaline shot. It's much more aggressive and and the the throttle response is a lot more sensitive

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Would you think me changing the LC rev limiter could of played apart?

[steve99]

Originally Posted by Joyriding_86

Would you think me changing the LC rev limiter could of played apart?

Its possible if you set the LC or FFS rev limt delta to strange values you will get issues.


When you flash a car the flash is either sucessfull or fails if you got a partial flash the car wont even start as checksum routine in ecu will fail.


Flash a un altered e85 tune and see how it goes


Ie no lc or ffs mods and no mods for pops


Just standard oft e85 tune




Are you running stock intake ??

[Joyriding_86]

Originally Posted by steve99

Its possible if you set the LC or FFS rev limt delta to strange values you will get issues.


When you flash a car the flash is either sucessfull or fails if you got a partial flash the car wont even start as checksum routine in ecu will fail.


Flash a un altered e85 tune and see how it goes


Ie no lc or ffs mods and no mods for pops


Just standard oft e85 tune




Are you running stock intake ??

Omg Steve! Yes everything is stock minus a borla axle back.
I just re flashed with the e85 stock tune and the car is still running funky. Just sitting here. The rpm is all over the place I just flashed about 10mins ago and was doing the adjusting by driving under 4k rpm
@steve99

[aceangel]

I had a similar problem with stalling before but figured it out. My air filter (a K&N drop-in) was old and was clogging up the intake. I changed the filter and it started to idle fine without stalling. Might want to check the air filter.

[Lantanafrs2]

My car idled like crap for 30 miles or so after flashing e85 tune. Cleared up though

[Joyriding_86]

Originally Posted by aceangel

I had a similar problem with stalling before but figured it out. My air filter (a K&N drop-in) was old and was clogging up the intake. I changed the filter and it started to idle fine without stalling. Might want to check the air filter.

I didn't even think of that. I'm going to Change it out tomorrow. The car drives alot better now. It's just cold starts are taking 2-3 time before running. Thanks mate.

[Joyriding_86]

Originally Posted by Lantanafrs2

My car idled like crap for 30 miles or so after flashing e85 tune. Cleared up though

Yeah I think I jumped the gun on everything even though I have it 70+ miles to learn.