erasing KAMs with A9L tune loaded in slot #4

Blackened302 · Nov 12, 2007

Wes recommended the above-mentioned method of erasing the KAMs (as opposed to disconnecting the battery for 30 minutes like i had been doing, lol), but i was wondering on the exact process of actually doing it. here's what i'm thinking:

1. write A9L tune to a position on the switch -- in my case, i have an A9L on position #4
2. turn off key
3. leave switch on position #4
4. turn key to "run", leave it for a few seconds
5. turn key off
6. turn switch to whatever other position w/ a real tune
7. turn on car, or keep tuning, as normal
8. BAM! KAMs erased?

is that the correct way of doing it? anyone care to share their method?

where do you see what the KAM values are to check them to see if they "zero out"? somewhere in CalEdit? or through an obd-1 code reader?

btw: major props to Wes for letting me bug him for all this tweecing stuff on AIM

Methodical · Nov 13, 2007

I used the A9L (bad tune) in position #4 to clear KAMs too. I just put the switch to #4 turn the key to on and car not running. The fuel pump primes and the fan turns on. I do this for just a couple of seconds. I always turn the key off before switching to another position - don't know if it makes a difference but I don't want to chance corrupting anything. You will know the KAMs are clear in Calcon when you go to datalog you will see the KAMs at 1.00 and they won't move for awhile until the car warms up and adaptive kicks in. I I let the car idle until it reaches normal operating temperature and then turn on Calcon to see if the KAMs are moving. If I need it to move faster, I go for drive to get them moving.

After a few times doing this I became more comfortable knowing that the KAMs were cleared whenever I did this trick. In other words, now I just turn to #4, clear KAMs and do my thing - no more double checking because I became comfortable with the method. I've been doing this from the 1st day I started TwEECing - never did the battery thing it's a waste of tuning time.

Al

Blackened302 · Nov 13, 2007

thanks, Al. yeah, Wes lol'd when i told him i was still using the 'disconnect battery' method, hehe.

vristang · Nov 13, 2007

Punisher302 said:
1. write A9L tune to a position on the switch -- in my case, i have an A9L on position #4
2. turn off key
3. leave switch on position #4
4. turn key to "run", leave it for a few seconds
5. turn key off
6. turn switch to whatever other position w/ a real tune
7. turn on car, or keep tuning, as normal
8. BAM! KAMs erased?

That's basically how I did it...
I was tuning with an X3Z though, don't remember what file I used for clearing KAM...

Not sure if it matters, but I too always turned the key off when changing to or from the 'bad' tune.
On several occasions I changed the tune with the car running, but I was dorking around with something else at the time.

jason

Stanger007 · Nov 13, 2007

I do not think it would matter, but one thing to note is that I also set my Strategy to A9L when uploading the "corrupt" tune.

I'm not sure if the out of range values are resized into proper values according to your strategy or not, but selecting A9L would prevent this and make it all work out. What you are doing is introducing bad values into memory locations triggering a routine in the PCM that clears the learned data.

Wes

Blackened302 · Nov 13, 2007

yeah, that's what i did: set the strategy to A9L, saved the ccf file as "a9l tune to wipe kams" and loaded that in slot #4.

thanks!

BlackVert · Nov 13, 2007

that is how i did it, but i put the invalid tune into position #1

key off
switch to bad tune
key on for a few seconds, fan and fuel pump turn on
key off
switch back to current tune
start car

datalog shows kamrfs as 0

not fishing for compliments or anything, but i was actually the one who started the thread about it over on the old tweecer forum a few years back ... wow that was 3 years ago now

http://eectuning.org/forums/viewtopic.php?t=3691

Blackened302 · Nov 13, 2007

cool!

you aren't worried you'll lose the switch and wind up having the bad tune as the default?

vristang · Nov 13, 2007

BlackVert said:
datalog shows kamrfs as 0

Zero?

BlackVert said:
not fishing for compliments or anything, but i was actually the one who started the thread about it over on the old tweecer forum a few years back ... wow that was 3 years ago now

http://eectuning.org/forums/viewtopic.php?t=3691

Still haven't seen anyone blame this for any tune degradation problems... or anything else for that matter

jason

BlackVert · Nov 13, 2007

Punisher302 said:
cool!

you aren't worried you'll lose the switch and wind up having the bad tune as the default?

hmmmm ... good point. i have my switch routed back behind the kick panel and into the glove box, so i'm not woried about losing it, but i probably should have my latest good tune on #1 and put the a9l somewhere else, just to be safe. #4 would be the next most logical slot for it ...

vristang said:
Zero?

Still haven't seen anyone blame this for any tune degradation problems... or anything else for that matter

jason

sorry ... 1.0 is right ... i was thinking of cleared as 0 ... i have done so little tuning in the last year, details like that have gotten sorta fuzzy

Methodical · Nov 14, 2007

Punisher302 said:
thanks, Al. yeah, Wes lol'd when i told him i was still using the 'disconnect battery' method, hehe.

No problem. I see lots of peeps do this. I always suggest to peeps to not put the bad tune in position 1 because that's the default tune and if they lost the switch or the switch goes bad they will be SOL. However, if they do choose to use switch 1, it could double as an antitheft device - the best antitheft device on the market too.

Blackened302 · Nov 14, 2007

hmm, anti-theft--that's interesting!

i'm assuming the car will not turn on w/ the a9L tune selected?

will trying screw the eec (or anything else) up?

Stanger007 · Nov 14, 2007

I think it is possible to start the car, it will be in limp mode.

Wes

vristang · Nov 14, 2007

BlackVert said:
sorry ... 1.0 is right ... i was thinking of cleared as 0 ... i have done so little tuning in the last year, details like that have gotten sorta fuzzy

I assumed it was a typo, but I had to mess with ya'

I ran my X3Z on a a 'bad' tune when I first started using the tweecer...
(I didn't think the tweecer would have a tune written to it when delivered new , who knew... )

The car did run, but it wouldn't have driven down the road.
Not sure what the tune was, I never looked into it.

jason

Stanger007 · Nov 14, 2007

I've run mine on the A9L - you get a CEL and pretty much crappy running conditions... very rich... gotta stay on throttle to go anywhere.

Wes

Blackened302 · Nov 14, 2007

that gets me to thinking---is there any way to turn off the fuel pump w/ the tweecer? if so, we could build a tune w/ the pump off and that'll act like an anti-theft setting.

Stanger007 · Nov 14, 2007

Not in the twEECer, but I bet you could be tricky with the cranking fuel/injector sizing to make the car not start.

Wes

Stanger007 · Nov 17, 2007

FWIW, the latest (beta) version of the CBAZA definition in BinaryEditor has a scalar for clearing the KAMs.

Wes

Black1987Stang · Nov 20, 2007

Seems like everytime I search for an answer to my Tweecer tuning questions with the search button they all come up in the 94-95 section

Im trying to do this same approach with my 87 (A9L from a 92 though). I know this is the 94-95 forum but since it's a somewhat universal tip I figured I would ask here.

I tried to load in a CBAZA strategy but I'm either doing it wrong or it's not working

I see you can use the J414? strategy to clear the kams in the A9L but I dont even see J414 in the Strategy drop down box?

Sooo step by step how do I load a "kam clearing" strategy into a knob tweecer position?
I selected CBAZA from the drop down box and wrote it to #4 position. Went back to the drop down box and selected A9L. Read from #2 (A9L strategy) turned off key. Turned knob to #4, turned on key, fuel pump primed, waited a couple more seconds, turned off key, turned it back to #2, started up and started to datalog and they were not at 1.

Did I do it right? If not can someone tell me how to do it the Right way. Much Appreciated

vristang · Nov 20, 2007

Try looking for J4J1.bin

Or just use something else
LA3
PK1
PE*

I think I was using a DDX or DD4... I have no idea what car that file would run, but it did clear my kams...

I don't think you need to change strategies to do this... you are just loading the .bin/.ccf to a switch position...

shoot me a pm if you like...

Watch out sn95 dudes...
the Fox dudes are gonna take over

jason

erasing KAMs with A9L tune loaded in slot #4

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