Does anyone know if a technosquare l-spec tuned ecu can get erased by the dealer? i got a used ecu and had it programed to my car and i cant rev to 7100rpm. thanks

 

So, I'm a little confused here.

You got a used ECU, had it programmed for your car & key, and now you can't rev to 7100? Did anywhere in that loop, you send it to TS for reprogramming?

 

i shouldve mentioned that it has a l spec flash on it(it was star-bucks(username) i got it in the classifieds).it has a technosquare sticker on it.its suposed to have the lspec tune on it.but its not reving to 7100rpm, i had them advance my timing while they programed the ecu.

 

So, you had the dealer program this ECU for your car, and ever since then, it doesn't have extended rev limit any longer, though it never did on your car? Sorry, just trying to get all the facts straight.

 

i was in the classifieds and saw that starbucks was parting out his car and had a L-Spec flashed ecu for sale. i got it, hooked it up and it wouldnt start the car(obviously,i just wanted to clarify). so i plugged in my stock ecu, drove down to the dealer, had them program my keys to the tuned ecu. afterwards i went out for a drive expecting my car to now have the L-spec features(rev limit,speed limiter, and throttle opening 100%). and found that it wasnt reving to 7100rpm like it shouldve. so i was wondering if when they programed the tuned ecu they couldve deleted the l-spec features...

 

Possibly. why don't you call Technosquare and ask them about it? They'll know more about the programming and what can/can't be erased than a bunch of internet experts.

 

^^^

Although, it's sometimes difficult to get a hold of someone there that can help.


Also, on the sticker/decal on the ECU, it has a # and that # is specific to the tune they performed on your ECU.

 

yeah i called them up and i didnt get a real answer out of them,they didnt seem very interested in helping me. i asked them if the ecu number would help and they said no.(i called them before i made this thread,otherwise i wouldnt have made it,lol). there is a chance it has to do with my crank sensor relocate that was done to fit my 350z flywheel(we notched the bellhousing so the crank sensor could get a signal. because it acted like a rev limiter when it lost the signal,so we moved it over and reved it up untill it went to redline. my theory is that maybe its losing the signal from the flywheel and thats why i cant rev higher. so instead of notching it again, im going to wait till my flywheel comes in(fidanza is backordered) and put it back to stock with the new clutch/flywheel setup.

i just wanted to see if anyone knew if the programing the dealer did may have erased the tune on the ecu.

 

This is a good thread and has good meaning. Do you have some type of logging capability to see what RPM it's actually limiting to? At the same time, that data log might tell us more in that it may not be reading the correct signal from your CKPS, and that will show up in the log.

 

on my safc when im in the monitoring you can press the up arrow and it gives you data(or what appears to be data). i pressed up on it after a 2nd gear pull and it said throttle 100%,AFL 68.9%,6741rpm, COR 0 (its not tuned after 6500rpm). so my theory is if it saw 6741, its going past the factory limit of 6600 right??and maybe it is losing the signal

 

i think it's more likely that the momentum of the engine just spun it a little bit past the rev limiter. you do it in a higher gear and it will probably not rev as high, because the engine won't be accelerating so quickly.

 

^I second this. Especially If you logged that in 1st gear. My vafcII logs upwards of around 6650k rpm if I smack the limiter in 2nd or 3rd gear and use that peak hold function. I'm sure it will see 6700k if I smack the limiter in 1st. You should be able to carry alot more momentum in 2nd gear than me since you have a 3.5.

 

i thought TS actually opens the ECU and change actual hardware for this raised rev so unless the dealership redid this (which programming to a specific car is software from the stealer) then the revs should stay at 7100???...

 

Yes, the 'Peak Hold' option. Was this a rev limiter tap? Or,

Just an FYI the SAFC/VAFC usually and typically has been known to lose signal past 6000+, as in after 6k, there is nothing.. So 67xx seems highly unlikely for it to lose signal.

 

ok so i called technosqaure again to see if i could get a better answer to this issue. they dont know what a key program at the dealer does to there tune.

like grand hustle said i thought the technosquare tune was permanent and couldnt be erased,but it doesnt seem that way, the tach always goes alil into the red,but its not going any higher than usual.

 

and yes that 2nd gear pull did tap the "limiter"

 

Either that or Nissan just used an ECU they had lying around. Some grandma-ma probably enjoying her revs served up @ 7100 RPM now.

 

i found a thread on my350z.com and found....
"you cant really reset the technosquare tune. you would need someone like technosquare to reprogram back to stock. the ecu reset that the dealership does is not the same. this tune is written into the eeprom of the ecu and doesnt just get reset"


any input on that?

 

haha, they didnt install the ecu,they just plugged it in and programed it, its got that nice technosquare sticker still on it.

 

im gunna wait until i put it my new flywheel to do anything, it seems unlikely that the tuning software could get erased though, im hoping that my custom crank sensor is losing signal up top,like i said when we moved the sensor over (to get the car to even run after the install) it took some fine tuning to get it to rev to redline,it would rev to 4000 and bounce back like a limter,then 4500,then 5000 and so on until we hit 6500ish and we stopped,maybe because we stopped moving it over,it never got fully centered on the 350z ring gear and isnt picking up a signal in the 6500rpm+ range, or at least thats what i want it to be lol

 

something does not seem right..

 

technosquares FAQ gives hints that its not erasable,but it doesn't say specifically that its permanent.

"Can I get a spare ECU/ do you have a core swap program?
No. The current Nissan models have an immobilizer chip build in each car with its own key for thief prevention. This means that you CAN NOT get another ECU and run your car. It will not start. However, we can duplicate your immobilizer into another ECU."

"Will it affect my Nissan warranty if I bring it into the dealership?
We do not touch the diagnostic part of the program, so if the dealer connect their scan tool to your car, they can't tell if your ECU is reprogrammed or not unless you tell them so."

 

I think you're onto something here.

 

Have you opened the ecu to verify you have a techno ecu rather than a stock ecu with a techno lid?

 

well i got it on the org. so i figured it was legit. i never even thought about opening it.

 

see if the speed limiter removal is there
i highly doubt the dealer could have erased your tune...any way to check your A/F ratio?? could this flash have everything else but the raised revs??

 

its an L spec tune,so its just the rev limiter,speed limiter(which i dont plan on going over 148mph), and throttle adjustments(which is argued not to be true). my a/f is tuned through my safc, which is working fine.



and the seller even told me "your gunna love the extended revs".

 

... ...

Keep us updated when you get the flywheel ... I'm getting slightly concerned here.

 

you should. I got screwed on TWO ECUs back in the day on the .org. one was just mislabeled and the guy didn't know what he had (he thought he had a JWT ECU when he really had a JET ECU - also known as a stock ECU with a sticker on it) and one guy purposely scammed me and sold me a stock ECU that he claimed was a GForce (Technosquare, now).

 

And Star-Bucks' dyno wasn't very .. ahh believable.



http://forums.maxima.org/dyno-discus...-max-dyno.html


With that said it wasn't ever clear how they tapped the RPM signal.

 

i just read that thread on his dyno, even if his numbers where wacked,it appears that he still had the capability to rev into the 7k range.

what would i be looking for if i opened up the ecu?? is there some sort of technosquare label inside? i replace ecu's all the time(newer corolla's are notorious) but ive never opened one up.

 

When you have the car programmed for a new key or ECU you are not actually programming the ECU. You are programming the NATS IMMU for the specific key information from which the ECU looks for a particular all-clear signal. Unless the dealership physically swapped the ECU out with another, I doubt they had anything to do with your current ECU's behavior.

 

If that's the case ^^^then even a little more concern.

But seriously, he said he revs to 7800 .. come on, not even my tach is that bad. And once again, it was never clear how the RPM signal was tapped or read, once again raising some colored flag. I hope this gets resolved when you get your flywheel.

 

well i did mention i had the timing advanced. is it possible they re-calibrated the ecu after the advance and removed the tuning?


NmexMax, you think he was lying about 7800k? or swapped the cover?

does anyone know what to look for in the ecu for evidence?

 

so i got my new clutch and flywheel installed and yeah i still cant rev to 7100rpm....kinda lame.....

 

You should contact the seller.

 

Update?

 

Yeah I am curious as well to what has happened.