I was going to go with a JB4 but upon further research I think a Cobb is the way to go. I'm coming up on 15k miles. I wanted to make sure I didn't have any strange mechanical issues pop up but my VB has been solid.
When i was a Honda technician the Honda HDS is a master scanner for Honda. I remember scanning at the time my cammed 2008 Civic Si with the HDS and it definitely showed race my race Calibration on the scanner lol. Master scanners reads EVERYTHING so yes dealerships can see your tune.
Currently got the AP had the JB4 and ive got a handful more than 20 subscribers that have had transmissions and turbos replaced under warranty with the JB4. You can't prove it because it never leaves a trace on the ecu, so as far as im concerned it could be chalked up to a malfunction Im rolling the dice now with my current power levels
@@thefoodcan no, they dont. its piggyback, meaning it just tricks the ECU, basically hijacking all sensor readouts. As far as the ECU is concerned, the car is running totally normal and stock.
@@jeanjeanmich i fail to see how they can prove its modded, all that would prove is that the vehicle in not running to factory spec, which would place even more blame on them if you play your cards right and maintain complete and total ignorance.
I can confirm that even if you remove the cobb accessport software from your ECU the max PSI value is still there. Butttt, I put 1 gallon of e85 in my tank down here in Florida at 0 Ft above sea level and I did boost to 17 PSI when getting onto the highway. So idk if that would be enough to void a warranty. Meaning a mild tune also produces this amount of PSI for boost. Like another commentor said, depending on your elevation and ambient temperature this boost value will go up or down that would very hard to argue in court.
We receive lots of complaints for Subaru engine issues. In many cases, Subaru will do the right thing and cover the problem. But, if your vehicle is running an aftermarket tune, you are at the mercy of the dealership. Our recommendation is to always keep the engine stock while still under warranty. After the warranty expires, then yes, go ahead and have fun with custom tuning.
Mitsubishi did almost the same thing. Where the tracked the max RPM through the ECU and they could see if it ever went over their threshold set by the factory, which usually ment it was tuned at some point in it's life.
Yeah, they can tell.I'm from Sydney Australia there use to be MRT in Sydney if you had it turned by them, the warranty would still be valid. It usually consisted of tune,exhaust, air filter, and e85. But if done elsewhere the warranty would be void. Cheers brother
I wonder if getting an ecu from a crashed unit (assuming that one wasn't modified) lol and swapping it would work? Maybe not if there is data to match it to the car. Just a thought
The best way to do that would be to keep your factory eco stock and tucked away for when the car needs warranty work. Run the tune on the salvaged ecu. Or just get a standalone ecu
@AutoEnthusiast if that's the case then there must be a vacuum line going to a mechanical boost gauge and it should be able to be disabled or regulated like old mechanical boost controllers would do. It would obviously have to be on the charge side but there is no such thing unless they are using manifold absolute pressure
The jb4 does intercept the map sensor readings like the op stated so I don't know where it would possibly be getting other numbers from. There are no other sensors that read vacuum
This will be fun I just bought a 22 RS and didn't realise the car had a cat back exhaust or tune until after I signed the papers. It was a Holden dealership. They told me it had unlimited km factory warranty. Lucky i took photos because there was a cobb flash tuner in the back seat but i had no idea what it was until after i got home and opened it
Easy way to check as a tech is ecu calibration ID. If its different than stock then theres modification. If you really wanted to go out of your way, then yea you can check the RoB to confirm.
It’s all over the place D: some days is only 10psi. Sometimes it’s almost 1bar at 14.2. Mine usually sits between 11.2 and 13.3 in FL. But my 91 300zx with a manual boost controller usually always hit 15.5 (where I set it to) and was way more consistent until heat soak kicked in
The real question is, can we tune a spare ecu then throw the original back on for warranty purposes? Before anyone says "has to be reprogrammed" i came from brz/frs and you can swap those super easy with just a wire and some time.
Hearsay until we see Subaru documentation confirming that they have these capabilities. Anyone can rent the services manual for 72 hours. Shouldn’t be hard to find in that amount of time if it exists.
Subaru cannot or did not see the JB4 on my Blown CVT 2022 OBW, ....it was installed by good guys with limited knowledge, my fault not theirs....Subaru replaced my CVT @$12k!! ... however, they made me return my OBW to stock, removed Ironman lift and re-installed OEM Tires, not my 245/60/18 (all back on BTW!)......gonna try again with shop with ALOT of experience in NJ, ..OOOH it was soo fast (for 3 months, was over 300hp, probably 310-330 HP estimate, wouldn't go over 290 next time....
This is assuming those log tables are not rewritten with flashing whether using cobb or something else. Not sure how jb4 would be logged as its trucking ecu. Either way i have 19k miles on e50 with just ets intake and not one problem. Anyone not havinf a proper tune done is losing out big time.
I have va wrx never modified 8 years and I will not mod my va but if I get vb wrx ı will definitely get mod and I don't care dealership know or don't know. Fa24 lots of potential
Your ECU is a computer. It is data logging... it will know if you missed a shift and over revved so it will damn sure know if its been tuned. Your kidding yourself if you think you are going tune back to stock for a service appointment or warranty issue and theybarent going to see.
What is a normal peak boost value on these cars? I know overboost is certainly a thing stock. I can't seem to hit it anymore, but my peak in a VA wrx is 22 psi. Better yet, what is a tuned peak boost value to expect?
Of course they can! Do not believe the JB4 propaganda. First, JB4 IS a good product, I'm not saying that. But if your car fails to the point where your dealer is going to have to fork over $1k-$5k in engine repairs, they will scan the ECU and send it to Subaru. If they see that the timing was being pulled back furiously, at the same time boost, fueling were recorded as NORMAL (the JB4 fools the ECU) and the EGT temps are through the roof, you were running a tune! Another giveaway is that everything in an engine bay gets dirty. Fingerprints and cleaned plugs everywhere a JB4 plugs into, and you were undoing things and reconnecting things under the hood. Torn tape, popped wire hold downs, many people don't notice they have done. JB4 is only invisible if they don't suspect it. Worn clutch at 34k? Probably won't suspect, just think you are a bad driver. BTW, I tuned mine. I've run JB4 on three past cars. But it is NOT INVISIBLE.
No they can’t , this is what they will tell people because they have to in reality a piggyback does not rewrite or change any parameters within the ECU and so there is no way for them to be able to find out about that, they can only find out if the ECU was flashed
Very uneducated video. JB4 is undetectable because the car doesn’t data log the higher boost because it thinks it was running lower boost. If you are under warranty then play it smart and run Jb4
Lol Bad incompetent advice. I think Subaru knows these cars ecu's better than the best tuners in the world. Lets see who has more money to fight in court.🤣
Subaru is not trying to create a narative.. they have a right to deny warranty if you alter the vehicle. This is not complicated. Why in the world should they be responsible for ANY warranty issues if you take this car outside of the factory perameters. Tuners and enthusiast who tune are more than aware if this. Subaru is completely justified to not warranty a tuned vehicle.
100% agree. A warranty is for the car as you bought it, not for anything that is not OEM.. You want to play with your car and add stuff.. YOU are voiding your warranty PERIOD. i was a BMW Mechanic for 20+ years, the voided warranties for wheel and tire changes. As an example, a customer bought and M3 and BMW installed a aftermarket set of 19' rims and tires with the new car. they shipped the car to Washington state and the dealership in WA Voided the warranty for the car. after 3 months of back and forth they reinstated the warranty
I bought my 2023 WRX... looked the car saleman and said... this car will not be staying stock so we don't neeed to talk warranties XD lololol But to be fair I went into buying a WRX knowing well ahead the risks and planned accordingly. New Channel coming up soon!
Ok so what? What's the point of having a car like this if your not willing to modify it and enjoy it.....every one with a sports car, jeep wrangler or jacked up truck modifies it.....that's why you bought it
Because it's not your car , your making payments on it and if you mess with the car then you could possibly fuck it up for a future owner if you trade it or lose ownership of the vehicle.
I was going to go with a JB4 but upon further research I think a Cobb is the way to go. I'm coming up on 15k miles. I wanted to make sure I didn't have any strange mechanical issues pop up but my VB has been solid.
Same here
This is a very uneducated video. JB4 is great and there is pros and cons to both a tune and JB4.
You went the wrong route , I had Cobb and now running the jb4 and the jb4 is way better !
When i was a Honda technician the Honda HDS is a master scanner for Honda. I remember scanning at the time my cammed 2008 Civic Si with the HDS and it definitely showed race my race Calibration on the scanner lol. Master scanners reads EVERYTHING so yes dealerships can see your tune.
A jb4 is not a tune. It isn’t detectable unless there is obvious tampering
Everything software related has an audit log.
can they tell if your car idles at 4000 RPMS for 6 minutes when you start in on a warm day . must be the GREEN THING .
looool
😂😂😂
Currently got the AP had the JB4 and ive got a handful more than 20 subscribers that have had transmissions and turbos replaced under warranty with the JB4. You can't prove it because it never leaves a trace on the ecu, so as far as im concerned it could be chalked up to a malfunction Im rolling the dice now with my current power levels
I feel like some of the dealerships know but still push for warranty repair for their cut
@@thefoodcan its possible for sure!
@@thefoodcan no, they dont. its piggyback, meaning it just tricks the ECU, basically hijacking all sensor readouts. As far as the ECU is concerned, the car is running totally normal and stock.
@@Cichlid_Visuals They can 100% see the boost logs and whatnot, they won't match with oem spec. That's how they get you.
@@jeanjeanmich i fail to see how they can prove its modded, all that would prove is that the vehicle in not running to factory spec, which would place even more blame on them if you play your cards right and maintain complete and total ignorance.
I can confirm that even if you remove the cobb accessport software from your ECU the max PSI value is still there. Butttt, I put 1 gallon of e85 in my tank down here in Florida at 0 Ft above sea level and I did boost to 17 PSI when getting onto the highway. So idk if that would be enough to void a warranty. Meaning a mild tune also produces this amount of PSI for boost. Like another commentor said, depending on your elevation and ambient temperature this boost value will go up or down that would very hard to argue in court.
Peak boost on my 2018 is 22.2 psi completely stock, I think it glitches or possible to have something way high for a second
We receive lots of complaints for Subaru engine issues. In many cases, Subaru will do the right thing and cover the problem. But, if your vehicle is running an aftermarket tune, you are at the mercy of the dealership. Our recommendation is to always keep the engine stock while still under warranty. After the warranty expires, then yes, go ahead and have fun with custom tuning.
Moral of the story: always return to stock when going in for any warranty work
You didn’t watch the video, did you? Lol
@@PsunnProductions Get a pro tune and bare with the risks or return to stock and roll the dice even at the dealership.
What if the battery dies?
What if you hold the ac radio controls and got the radio tune button 6 times and disable the “begin recording” mode?
Thanks for this video
i might wait until my 22 is out of warranty to install a JB4
Funny they can’t check the ecu to find faults but they can to find if you’ve tuned it..
Mitsubishi did almost the same thing. Where the tracked the max RPM through the ECU and they could see if it ever went over their threshold set by the factory, which usually ment it was tuned at some point in it's life.
Yeah, they can tell.I'm from Sydney Australia there use to be MRT in Sydney if you had it turned by them, the warranty would still be valid. It usually consisted of tune,exhaust, air filter, and e85. But if done elsewhere the warranty would be void. Cheers brother
Wait really?? How long was that a thing?
@@AutoEnthusiastI’m assuming it is sorta the same deal that APR has (or had) with vw/Audi products.
I wonder if getting an ecu from a crashed unit (assuming that one wasn't modified) lol and swapping it would work? Maybe not if there is data to match it to the car. Just a thought
The best way to do that would be to keep your factory eco stock and tucked away for when the car needs warranty work. Run the tune on the salvaged ecu. Or just get a standalone ecu
the mileage won’t line up
I was under the impression that with the jb4, the signal it sends to the ECU is the stock boost values.
From everything I have heard, boost readings are hardline mechanical readings that are stored, and max values are recorded.
@AutoEnthusiast if that's the case then there must be a vacuum line going to a mechanical boost gauge and it should be able to be disabled or regulated like old mechanical boost controllers would do. It would obviously have to be on the charge side but there is no such thing unless they are using manifold absolute pressure
The jb4 does intercept the map sensor readings like the op stated so I don't know where it would possibly be getting other numbers from. There are no other sensors that read vacuum
This will be fun I just bought a 22 RS and didn't realise the car had a cat back exhaust or tune until after I signed the papers. It was a Holden dealership. They told me it had unlimited km factory warranty. Lucky i took photos because there was a cobb flash tuner in the back seat but i had no idea what it was until after i got home and opened it
me getting warranty denied with a max of 15psi stock
Easy way to check as a tech is ecu calibration ID. If its different than stock then theres modification. If you really wanted to go out of your way, then yea you can check the RoB to confirm.
JB4 doesnt change the calibration ID
What is the maximum factory boost? I thought it was in the 12 pound range. I’ve already been into mid 13 pounds going uphill.
It’s all over the place D: some days is only 10psi. Sometimes it’s almost 1bar at 14.2. Mine usually sits between 11.2 and 13.3 in FL. But my 91 300zx with a manual boost controller usually always hit 15.5 (where I set it to) and was way more consistent until heat soak kicked in
The real question is, can we tune a spare ecu then throw the original back on for warranty purposes? Before anyone says "has to be reprogrammed" i came from brz/frs and you can swap those super easy with just a wire and some time.
Has to be programmed to talk to the othe modules in the car are theft is real easy.
@@ljohnson9440 You've done it before?
Hearsay until we see Subaru documentation confirming that they have these capabilities. Anyone can rent the services manual for 72 hours. Shouldn’t be hard to find in that amount of time if it exists.
🤣
how high of boost does it have to be till then can tell its tune they didnt say?
~12psi
Buys back up ECU
Subaru cannot or did not see the JB4 on my Blown CVT 2022 OBW, ....it was installed by good guys with limited knowledge, my fault not theirs....Subaru replaced my CVT @$12k!! ... however, they made me return my OBW to stock, removed Ironman lift and re-installed OEM Tires, not my 245/60/18 (all back on BTW!)......gonna try again with shop with ALOT of experience in NJ, ..OOOH it was soo fast (for 3 months, was over 300hp, probably 310-330 HP estimate, wouldn't go over 290 next time....
This is assuming those log tables are not rewritten with flashing whether using cobb or something else. Not sure how jb4 would be logged as its trucking ecu.
Either way i have 19k miles on e50 with just ets intake and not one problem. Anyone not havinf a proper tune done is losing out big time.
I have va wrx never modified 8 years and I will not mod my va but if I get vb wrx ı will definitely get mod and I don't care dealership know or don't know. Fa24 lots of potential
What of you bought a stock ecu and flashed one of them and not the original, then switched them out when going to Subaru, would they know??
Pretty sure the ECU is tied to the car via VIN# or Serial#. If the just ECU has a different VIN or Serial they know its not the original.
@@timhamock2996that's why he's saying to put the stock one back in
Question I have a max boost of 21 psi on bone stock 21 wrx how is this possible ?
Could happen on the FA20!
Excellent vidéo
cheers thanks!
Your ECU is a computer. It is data logging... it will know if you missed a shift and over revved so it will damn sure know if its been tuned. Your kidding yourself if you think you are going tune back to stock for a service appointment or warranty issue and theybarent going to see.
What is a normal peak boost value on these cars? I know overboost is certainly a thing stock. I can't seem to hit it anymore, but my peak in a VA wrx is 22 psi.
Better yet, what is a tuned peak boost value to expect?
Of course they can! Do not believe the JB4 propaganda. First, JB4 IS a good product, I'm not saying that. But if your car fails to the point where your dealer is going to have to fork over $1k-$5k in engine repairs, they will scan the ECU and send it to Subaru. If they see that the timing was being pulled back furiously, at the same time boost, fueling were recorded as NORMAL (the JB4 fools the ECU) and the EGT temps are through the roof, you were running a tune!
Another giveaway is that everything in an engine bay gets dirty. Fingerprints and cleaned plugs everywhere a JB4 plugs into, and you were undoing things and reconnecting things under the hood. Torn tape, popped wire hold downs, many people don't notice they have done.
JB4 is only invisible if they don't suspect it. Worn clutch at 34k? Probably won't suspect, just think you are a bad driver.
BTW, I tuned mine. I've run JB4 on three past cars. But it is NOT INVISIBLE.
No they can’t , this is what they will tell people because they have to in reality a piggyback does not rewrite or change any parameters within the ECU and so there is no way for them to be able to find out about that, they can only find out if the ECU was flashed
I thought this was a given
Gotta love these silly video’s. We’ve been able to do this for a long time. This is not new information at all.
gotta love these sill comments, hahah had to sorry. Read the comments section, and you will see why I made the video...
@@AutoEnthusiastI get it, there are a lot of dumb WRX owners.
Very uneducated video. JB4 is undetectable because the car doesn’t data log the higher boost because it thinks it was running lower boost. If you are under warranty then play it smart and run Jb4
Lol Bad incompetent advice. I think Subaru knows these cars ecu's better than the best tuners in the world. Lets see who has more money to fight in court.🤣
@@ljohnson9440 show proof of what they can do and see. I'll wait.
@devonswindell9735 How about you prove what they can't. I'll wait
Subaru is not trying to create a narative.. they have a right to deny warranty if you alter the vehicle. This is not complicated. Why in the world should they be responsible for ANY warranty issues if you take this car outside of the factory perameters. Tuners and enthusiast who tune are more than aware if this. Subaru is completely justified to not warranty a tuned vehicle.
100% agree. A warranty is for the car as you bought it, not for anything that is not OEM.. You want to play with your car and add stuff.. YOU are voiding your warranty PERIOD. i was a BMW Mechanic for 20+ years, the voided warranties for wheel and tire changes. As an example, a customer bought and M3 and BMW installed a aftermarket set of 19' rims and tires with the new car. they shipped the car to Washington state and the dealership in WA Voided the warranty for the car. after 3 months of back and forth they reinstated the warranty
No one cares buddy you have been a bum for 20 plus years
I bought my 2023 WRX... looked the car saleman and said... this car will not be staying stock so we don't neeed to talk warranties XD lololol
But to be fair I went into buying a WRX knowing well ahead the risks and planned accordingly. New Channel coming up soon!
Ok so what? What's the point of having a car like this if your not willing to modify it and enjoy it.....every one with a sports car, jeep wrangler or jacked up truck modifies it.....that's why you bought it
Because it's not your car , your making payments on it and if you mess with the car then you could possibly fuck it up for a future owner if you trade it or lose ownership of the vehicle.
@@foreign9626dude calm down. Lol. Way worst shit to worry about than crying about people modding 😂😂