Advance Mutiplier resetting on restart?
 

So I got a new flash in the other day from fa20club. It had some fixes in it from Ecutek. We were unsure what the fixes were.

Also now I have been noticing the Advance multiplier is resetting to .7 on every restart of the car and it builds it self up back to 1 as I drive the car. But it just resets when I shut the car off. I don't remember this happening before. Am I nuts?

That does seem nuts. It should only reset to 1 after a reflash and then should settle to whatever it needs to be and change in small increments over time as it needs to. Perhaps they found a different way of calculating it or a different location in the ROM to datalog it. @FA20Club.com

The default IAM setting on the stock ROM is 0.70. Looks like it is unchanged with that flash.

It goes back up to 1 over a few miles of beating on the car. But when the car shuts off it restarts at .7

I did get logs last night to @FA20Club.com and this morning as well showing the Value reset.

Wonder if Ecutek botched the patch.

My car has done this since day 1 as well. It will keep the learned multiplier for a few mi utes after I key off but if it sits too long (couple hours) it will always reset to the initial IAM value set in the rom, be it 1.0 or .7 or whatever I set it too. The fact that it is working its way up to 1 is good though.

Glad Im not the only one seeing this behaviour. My original to. ID was ZA1JA00C


Ohh and I have never used ecuwreck, only brzedit and open flash. Seems very odd to me because IAM is long term k rock control. If you live in an area with crappy gas its gonna have to knock before the I am works down every day....

Hmm... I don't know why I never noticed this before. maybe since I normally do my logging in the afternoon after the car has been driven on and warmed up.
Hey @mad_sb can you pm me your email. I would like to send you some logs from last night and this morning and see what you think. I have the same logs off to Tony to check out. But dudes so damn busy making front pipes for me :) and turbos and what not for all you ballers. hehe He needs a clone.

Interesting. I have never seen that happen on my ROM, but now I will check it to verify.

Yea its weird I have had a flash on my car since March and I don't ever remember it doing that. I guess I can reflash to a previous tune and see if that does it as well.

just went and looked at my old logs... nothing to see here. it seems like its been this way the entire time at least for me since march.

Do you happen to have any logs of the car before it was flashed? I have a hard time believing this is the factory behaviour.. Perhaps if it works its way down low enough it will stick or switch to a lower initial value..

No. And even so the IAM values are hidden from what I can gather on the stock rom are they not?

I have logs from a stock flash but nothing before I flashed in march .

I sent tony a email saying never mind after seeing all my old logs did the same thing. Hope he still takes a look at it and let me know whats up.

Nahh, brzedit logger can read iam on an unflashed car i believe.. Just thinking it could possibly be something that both ecutek and brzedit change in the roms they distribute as "stock" Then again i think all brzedit does is embed your username in the header area of the rom so..... :bonk:

Did you ever check to see if this happening to you? I'm wondering if all the ecutek flashes do this? I haven't heard back from Tony @FA20Club.com about it yet. So I want to assume this is normal? maybe from a safey issue? Start it at .7 and if I have bad gas no harm no foul? but if the gas is good and the car likes what it seems then it raises timing back up?

Not sure the cause but on Visconti tunes I've always had both min and max of 1 except when I had a bad fuel. Never reset to .7 though, always starts at 1. I have seen it as low as .52 on bad gas.

can we get some more folks to check their IAM and see if it resets? To be clear, i want to know if the IAM resets to the original IAM value when the car sits overnight.

So, if you start it in the am and the IAM is .7 and as you drive it works up to say 1.0. Does it stay at 1.0 over night or does it reset back to .7 the following am?
@feldy, maybe we should create a poll or something?

From Toni IAM is always reset to .7 or 1.0 depending on where I set it for the customer after each flash

I'm thinking its this way incase of bad gas or something?

Yep, that is normal after a reflash, but it should not be reset after sitting overnight.

Mine always resets when the car has been sitting.

same,

what is your rom id? im on ZA1JA00C

To be clear guys, we are not talking the iam resetting after a reflash, that is normal. We are talking about the IAM resetting after the car sits for a couple of hours, no flashing involved.

I'm on
ZA1JA01D now. But I started on ZA1JA00D

On my E85 tune it jumps up to 1 with in ten minutes of the car being on. On pump gas it takes a bit longer.

Mine sat overnight and did not reset.

I will test this tonight after work, and tomorrow after an overnight sit.

My observations are subjective and I can't see what the IAM is doing, but after a hard drive (ex. autox) the car is noticeably quicker for the next few driving cycles, even driving to work the next day. I always assumed this was because the IAM had ramped up with learning with the high engine loads and rpms, and would then back off to a lower number with daily driving. This is quite consistent and within a couple of days of daily driving it is back to feeling "normal". This is with 94oct gas.

IAM doesn't ramp down unless the ecu believes knock is present or the iam resets after key off like myself and feldy are seeing.

You do have to be "on it" for the IAM to increase though, not neccesarily wot, but you do need to work the rev range with a little bit of load for the ecu to decide to click the IAM up then it re evaluates. So, it is very possible you are seeing the same thing, but we won't know unless you can log the IAM

what build date and rom ID?

I have a feeling it is build date related more than rom id. I will post up my build date tonight.

build date is April 2012.

rom ID is ZA1JA01C

my build date is also 4/12

Were you able to do any logging?

my build date is 10/2012 but my original rom id ZA1JA00C.


Curious how you have an earlier build date but a latter rom id??

But you are also on 00C rom id correct?


I might try porting my tune over to 01C rom file.

I was on 00d until this past June. That's when the updated flashed got sent to everyone with the transient table fix. since then I have been on 01d


Im on a auto that's why its 00d not 00c

Ecutek.

The IAM should default to 0.7 on every startup (or to whatever your tuner has set). Some cars (seems the push start in particular) "remember" the map you were on or the IAM. Not sure the exact reasons. The fine learning however, stays after resets. You'll see it as the learned knock value.

How can fine learning stay if IAM resets? Fine learning works in conjunction with the IAM, otherwise there would be no point. I know for sure my fine learning resets when the IAM does.

I can confirm the same behavior. fine learning resets to 0 on start up.

FWIW, my car, that does not see the IAM reset overnight, is a BRZ limited (push button start).

you know what maybe ill try the trick that makes ecutek remember which map you are on. I think it goes turn the car to on but don't crank it. turn it back off and the quickly back on and it should point to the map that you last left it. during the summer when I was on e85 I could get it to start on map 3 all the time by doing that. however I use mainly map 1 for my pump gas map.

for sure give it a shot, but im not using ecutek and never have so it may solve the issue for you, but not for me.

Well does brzedit have the option of multiple maps like ecutek? if it does.. does it remember which map you were on?

I was going to say maybe some leet haxor can figure it out and send us some code. Oh wait don't want this to get shut down. lols im sorry

lol,
No brzedit does not support map switching. They do chance a few things in the rom in unused space, like adding the customer name, and some other info, i originally thought it may be something to do with the changes ecutek and brzedit make to the rom file... but that does not seem to be the case.

I did notice the other day the IAM Value stuck until I cranked the car. I started to log before I cranked the car and the value was there and then reset to .7 when the car got spark. ill try to find it when im not drinking and playing gta