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Old 05-07-2013, 05:16 PM   #1
nismopowerdqg
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Question Stage 1

I have a 2010 WRX with 43k miles. I am getting my car opensource tuned week to a "stage 1" type of tune. My car is totally stock besides Nameless axle back exhaust. The tuner said he can put the car back to stock if need be for warranty issues. My question is, will Subaru be able to tell the car was tuned even if i put the stock tune back on? I just don't want to void my warranty and i know it will be voided if they find out. Thanks.
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Old 05-07-2013, 05:18 PM   #2
norkkron
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no

searching is a pretty cool guy
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Old 05-07-2013, 05:20 PM   #3
nismopowerdqg
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i tried but i couldn't find anything. sorry, figured id get flamed but i needed a definitive answer. thanks tho.
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Old 05-07-2013, 08:55 PM   #4
trev762
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Quote:
Originally Posted by nismopowerdqg View Post
i tried but i couldn't find anything. sorry, figured id get flamed but i needed a definitive answer. thanks tho.
Apparently with opensource Tunning is very sketchy. Yes they can put the stock tune back on but will it have the cid# the ecm originally had from factory is the question????

I would definitely get it writing from your tuner that he can put the stock tune back and with out the dealership detecting anything. If the tuner will not there's your answer.

There is one and only one tuning that advertises that the dealer cannot detect once uninstalled is the Cobb Accessport so do a search about Cobb hope this helps.
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Old 05-07-2013, 09:43 PM   #5
nismopowerdqg
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Quote:
Originally Posted by trev762 View Post
Apparently with opensource Tunning is very sketchy. Yes they can put the stock tune back on but will it have the cid# the ecm originally had from factory is the question????

I would definitely get it writing from your tuner that he can put the stock tune back and with out the dealership detecting anything. If the tuner will not there's your answer.

There is one and only one tuning that advertises that the dealer cannot detect once uninstalled is the Cobb Accessport so do a search about Cobb hope this helps.
I spoke with my tuner and he assured me that the dealer would not be able to detect the tune once the factory tune has been flashed back on. He said he would have my factory ECU ID (is that the cid# your talking about?) and factory tune saved on his computer and mine as well. He seems very knowledgeable, so i guess he knows what he is talking about. He is very well respected around here. He said he could also tune Cobb, but he said i shouldn't spend the money if i dont have to. He also said there is no flash counter on my ECU and the dealer can only look at parameters and when the last time the ECU was reset. Anybody else with more info is welcomed! Thanks for the help!
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Old 05-07-2013, 09:45 PM   #6
hillsboro
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Look up Checksum. Changing the data on the ecu changes the checksum. Unless he can make the ecu report the correct checksum. I'd look into it a bit more. The best advice is if you are worried about it don't mod your car. Looking for a definitive answer on here is not your best bet.

Last edited by hillsboro; 05-07-2013 at 09:59 PM.
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Old 05-07-2013, 09:59 PM   #7
trev762
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Originally Posted by hillsboro View Post
Look up Checksum.
Checksum means nothing equivalent to disconnecting your battery or putting a scanner to your ecm. Plus after a few key cycles will go back to normal with driving.

What happens is people blow their motor up then unmarry the AP then have the car towed with the checksum way off and well the rest is history.
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Old 05-07-2013, 10:01 PM   #8
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Originally Posted by trev762 View Post

Checksum means nothing equivalent to disconnecting your battery or putting a scanner to your ecm. Plus after a few key cycles will go back to normal with driving.

What happens is people blow their motor up then unmarry the AP then have the car towed with the checksum way off and well the rest is history.
This is why I said don't look for an answer here. People who don't know what they are talking about giving advice. I am not saying I'm right either. Talk to a few tuners and see if they can explain how the dealer can't tell, it's possible. My experience with professional tuners is the dealer can tell. Although my information could be a bit outdated. It seems like Cobb says the Dealer can't tell, so maybe the old checksum thing isn't a concern anymore.

Isn't your warranty up yet?

Last edited by hillsboro; 05-07-2013 at 10:13 PM.
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Old 05-07-2013, 10:07 PM   #9
trev762
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Quote:
Originally Posted by nismopowerdqg View Post

I spoke with my tuner and he assured me that the dealer would not be able to detect the tune once the factory tune has been flashed back on. He said he would have my factory ECU ID (is that the cid# your talking about?) and factory tune saved on his computer and mine as well. He seems very knowledgeable, so i guess he knows what he is talking about. He is very well respected around here. He said he could also tune Cobb, but he said i shouldn't spend the money if i dont have to. He also said there is no flash counter on my ECU and the dealer can only look at parameters and when the last time the ECU was reset. Anybody else with more info is welcomed! Thanks for the help!
Well if he's that sure have him put it in writing. I would never take somebody's word for it no matter how reputable they r especially wanting to protect your investment right???
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Old 05-07-2013, 10:16 PM   #10
trev762
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Quote:
Originally Posted by hillsboro View Post

This is why I said don't look for an answer here. People who don't know what they are talking about giving advice. Talk to a few tuners and see if they can explain how the dealer can't tell, it's possible. My experience with professional tuners is the dealer can tell.
Rolleyes:/
Its quite obvious u don't have a clue cuz for one there have been master techs on here that have verified they can't.
plus Cobb wouldn't advertise this and apparently the op's tuner plus my tuner has.
Its not that the dealer doesn't know they just don't have anything to prove the ecm was tuned/
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Old 05-07-2013, 10:34 PM   #11
nismopowerdqg
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i was reading up on checksum. and to me it seems as if you have low miles and flash the ECU and then reflash at 30k for warranty work it shows a low checksum. But if you have higher miles as i do (43k) the checksum is already pretty high. So if i drive on the tune for 10k before i need any warranty work, checksum probably wont come in to consideration. Sound right to you? haha
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Old 05-07-2013, 10:37 PM   #12
nismopowerdqg
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I have factory subaru warraty 60k powertrain. also have a 3rd party bumper to bumper warranty. i shouldnt be that concerned b/c i know plenty of shop owners who will more than likely call the 3rd party warranty company and say the motor blew for B/S reasons and i could more than likely get a built short block. But who knows. that 3rd party warranty expires at 80k
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Old 05-07-2013, 11:01 PM   #13
trev762
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Quote:
Originally Posted by nismopowerdqg View Post
i was reading up on checksum. and to me it seems as if you have low miles and flash the ECU and then reflash at 30k for warranty work it shows a low checksum. But if you have higher miles as i do (43k) the checksum is already pretty high. So if i drive on the tune for 10k before i need any warranty work, checksum probably wont come in to consideration. Sound right to you? haha
The bottom line here is u have to pay to play so if u r going to mod a vehicle knowing there's a chance of voiding a warranty claim and don't want to risk that then leave it stock. Plus having to take all your parts off and lie about how u never had beaten on it....etc.lol
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Old 05-08-2013, 09:06 AM   #14
nismopowerdqg
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yeah im just gonna get an accessport lol. seems easier and i loved the one i had on my bugeye.
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