The Much Awaited #230 (L99) Update.

[Chaos_Being]

Hmm, I had expected for them to find something more "dramatic" I suppose, but this does make perfect sense. Hopefully they find out that why your ECM took so long to learn, and use that to provide a fix to others that may need it.

Note to self... only top tier 93 octane when I get mine

Originally Posted by SK360

HPTuners.... copy High octane table, paste into Low octane table.

Homebrew "fix"

Neat idea, I wonder if that would work? You'd have to make sure that no one put some bad gas in your car though.

[BeermanSS]

they probably just copied the high octane map to the low octane map. LOL don't use low octane you'll prob be knocking like crazy. JK. Sounds like the PCM was stuck on the low octane table, it is supposed to only revert to that when the normal timing in the high octane table is causing too much knock.

[camaro1]

the newer cars do have different software in the ecm, i just read a vin# in the 31,000 range and 4 of the 8 ecm segments have newer software versions, the trans segment is the same

and this car is way faster with no break in miles than my 10,000 vin car

[UCF w00t]

Originally Posted by camaro1

the newer cars do have different software in the ecm, i just read a vin# in the 31,000 range and 4 of the 8 ecm segments have newer software versions, the trans segment is the same

and this car is way faster with no break in miles than my 10,000 vin car

Very interesting. You're probably not the person to ask but can people go to dealers and get these updates?

[patriotpa]

Originally Posted by SK360

HPTuners.... copy High octane table, paste into Low octane table.

Homebrew "fix"

...and you KR would move you to the low octane table, then with it still knocking, you may damage your engine and have NO warranty.

[Dakota Kid]

Originally Posted by camaro1

the newer cars do have different software in the ecm, i just read a vin# in the 31,000 range and 4 of the 8 ecm segments have newer software versions, the trans segment is the same

and this car is way faster with no break in miles than my 10,000 vin car

I pick mine up tonight (30.569) L99....I will test this out post haste.

[SK360]

Originally Posted by patriotpa

...and you KR would move you to the low octane table, then with it still knocking, you may damage your engine and have NO warranty.

Thats why if you are doing this you should
1) have a grasp on what you are doing with HPTuners
2) get it tuned by someone who does
3) Run the highest quality 93 you can

KR is there for a reason, it stops Knock... Turn off the knock sensors and do this with jacked up timing then yes you will have a problem.

The stock Hi Octane spark table will be conservative enough that you should not have to worry about WOT KR anyway unless you actually do run 87 octane.

[PQ]

Originally Posted by Scott@Bjorn3D

Well what I think what is happening is 2 part.

1. Engine getting more broke in.
2. Maybe it is learning the Octane but real slow.

My car started doing 6.2 0-60 at about 3000 miles. At almost 4000 miles it is running high 5's. Now it is running real good. Today driving around town not even half throttle from a stop light with traction off the car would spin the tires.

I hope it stays this way. I also hope they do come out with something for as rich as the cars do run. They said mine was running rich. I could gain even more HP and TRQ if they fixed that issue.

Mine has been a consistant 6.2 since I hit 1500 miles. The last 20 or so runs have all been right at 6.1-6.2 so it's pretty consistant. Car has well over 5000 miles on it now.

Originally Posted by JoshJ81

Did they just simply put 93 octane in and do a reset of the computer? If so, how did they do the reset? I see alot of speculations but no real answer.

I believe they are working on an answer.

Originally Posted by ElAntonius

I'll go back under my bridge now.

Originally Posted by BeermanSS

Sounds like the PCM was stuck on the low octane table, it is supposed to only revert to that when the normal timing in the high octane table is causing too much knock.

Originally Posted by UCF w00t

Very interesting. You're probably not the person to ask but can people go to dealers and get these updates?

Waiting now.

[Mr_Draco]

Another thing that worries me, what about those of us who live in regions that don't carry 93 octane?

[PQ]

Originally Posted by Mr_Draco

Another thing that worries me, what about those of us who live in regions that don't carry 93 octane?

You see, this is one of the things that makes me wonder. But how do we know ANY gas is true to the rating given?

[ElAntonius]

Originally Posted by irpq11

You see, this is one of the things that makes me wonder. But how do we know ANY gas is true to the rating given?

Well, there's a world of difference between 91 and 87. Those of you getting 91 shouldn't be that bad off, but yeah, there'll be a performance loss....the good news is that it will affect all cars that take 93...so it probably won't be THAT much of a competitive disadvantage.

Hell, here in Tampa all gas stations are pretty much that 10% ethanol stuff. 93 octane though...and in all honesty I'm not feeling much of a penalty for any particular brand of gas. I always get 93 though *shrug*

[PQ]

Originally Posted by ElAntonius

Well, there's a world of difference between 91 and 87. Those of you getting 91 shouldn't be that bad off, but yeah, there'll be a performance loss....the good news is that it will affect all cars that take 93...so it probably won't be THAT much of a competitive disadvantage.

Hell, here in Tampa all gas stations are pretty much that 10% ethanol stuff. 93 octane though...and in all honesty I'm not feeling much of a penalty for any particular brand of gas. I always get 93 though *shrug*

Sounds like it wouldn't matter if I put 99 octane in. It would just run richer and still be slow without a resolution.

[BeermanSS]

yeah, guess the pcm has a learning disability. They make a pill for that.

[ElAntonius]

Originally Posted by irpq11

Sounds like it wouldn't matter if I put 99 octane in. It would just run richer and still be slow without a resolution.

Who knows. You did report it was getting better slowly, wasn't it?

I'm guessing someone left an extra zero or two in the timeout parameter in the stock tune.

But yeah, typically cars need to be tuned to take advantage of a higher than intended octane rating. I've heard that the stock tune on the Mustang GT doesn't do any better with 93.