3rd Gen Tuner

You know what, my bad. I was thinking of the TaZer that unlocked all of that stuff on the Scat Pack

 

So if I'm following you guys correctly.. JB4 piggyback system doesn't void the warranty because no footprint being left behind. But, if you were to do an ECU flash this would leave a footprint and be able to be detected therefor voiding warranty?

 

thats the assumption...that a flash would be detected. I've read about people commenting how certain tunes/tuners say their tune doesnt leave a footprint but I'm not taking any chances. These devices can simply be removed and eventually sold and reused, where a tune is vin locked.

 

From my understanding of tuners...this is accurate. Plug & Play stuff goes "in line" versus actually reprogramming or flashing the ECU itself. When it's "in line", the tuner basically intercepts the incoming data, reinterprets it using the tuner programming criteria, and sends the updated data out for action by the truck. Once you remove the unit, the truck goes back to acting like normal.

 

Manipulate the computer with JB4 you’re good. Just remove before a dealer visit. Flash (change) the ECU and have a greater chance of voiding warranty. That just depends on your dealer and state.

 

Well, programmers are only VIN locked while your vehicle is tuned. Once it’s back to factory the tuner can be put on another vehicle. Most VIN locked devices being sold are only locked because that person forgot or were too ignorant to put their vehicle back to stock. I’m referring to the Superchips, Hypertech, Bullydog and so on type pocket tuners.

 

I’m hoping JB4 can do it. Then I’ll do the JB4 and Pedal Commander. Third device just adds to the costs. I do like Hypertechs speedo calibrator, its easy to use.

 

Wait, what is this Sport + thing?

 

For me, speedo/odo recalibration tool is #1 priority. Tuner is a fairly distant second. If I can get an all-in-one, if JB4 is working on incorporating speedo correction, then that would check all of the boxes for me.

 

The higher deep pockets lol have a sport + option where we stop at sport.

 

drive mode available in Platinum trim

 

By the way, I confirmed with Burger that our JB4 is capable of reading ethanol content via the Fuel-It! 0-5v output. Having an ethanol reading would help getting the right ethanol mix when playing with the big boy maps

 

dat sum bullsh!t lol Hate being poor

 

Yeah I’m already at the gas pump making life decisions. Feed the family or my truck? TRUCK

 

Y’all are talking like you know this is jb4 thing is untraceable. Are you sure the computer doesn’t log anything like highest boost seen, etc? Most manufacturers have been doing that a long time and they would ditch your warranty in a second if that was seen. Maybe it doesn’t but I’d be Leary until that’s actually confirmed.

 

Yes, depending on what code is stored there is associated freeze frame data. There will likely be associated data to the boost command vs actual if the DTC stored requires that data.

The untraceable means that the cal ID, etc is not altered. There will be no background flash data stored, when removing/installing the OBD data will not be reset, mileage since DTC cleared will not reset, mileage since recal will not be reset, etc.

Basically,
True tune with field failure, direct tow = dealer will see cal ID altered. OR the user will reflash prior to tow in, all data reset, fault freeze frame erased, etc.

This unit,
Field failure, remove hardware (with key off / CAN asleep), tow in = not traceable.

 

Right but will they be able to see that there was a high boost condition at some point?

 

I just explained they could, but it would be fault code dependent. Not all P codes pull/store the same freeze frame data. Induction issue, sure itll store boost data.

 

Can you use Techstream or another method to wipe the NVRAM storing those records?

 

I had JB4 on my previous vehicle for 30 months. Here's my opinion:

-excellent product, it never acted weird and didn't hurt the engine...... however:

-the DSG transmission failed after 2 years of the extra power. Just like they say, I removed the JB4 and had the transmission replaced under warranty (depends on your personal compass if this"feels" moral)

-because the JB4 tricks sensors to get the ECU to create more engine power, the ECU doesn't log certain items as faults because the data is being tricked. However, increased fueling and possibly faster than expected rates of acceleration could be logged as potential clues to being piggy-backed. So far, haven't heard of it, yet.

-all modern ECU can absolutely log if someone flashes the ECU. It is called "counter" or "flag" depending on manufacturer. Yes a tuner can delete their flash and reinstall the stock tune, however there's a non-reachable block in the ECU that counts every time it's been written to. Most ECU actually leave the factory with the counter at "zero". No way around it.

 

Sounds like it does the same thing as enabling tow mode does. Unless it actually increases compression and adjusts strokes to match, how does this "tricking the ecu" give you any more power?

 

it intercepts MAP readings and makes the ecu think its not making boost. Say the ECU commands 6psi. ECU tells the wastegate to close and it expects to see 6psi soon after. The JB4 intercepts that boost reading and tells the ECU it only made 4psi...then the ECU adjusts the wastegate some more to match the commanded psi to the psi its seeing. I dont think the jb4 modifies timing tables since it does not connect to anything other than the MAP sensors.

Because the computer thinks its still within stock parameters, but in reality its pumping out higher boost/air flow, it makes more power. So in essence, it is increasing "compression" by increasing cylinder pressure which is done with more boost.

Higher boost/air flow will leave a trace though...higher cat converter temps, higher intake air temps, higher flow readings from the mafs and injector duty cycles. Id assume all these would be captured in an engine related fault code. Considering that the JB4 only offers 6psi+ over stock, its nothing major. I was pushing 26psi in my 1.4 Cruze with custom tuning and stock was about 11 or so....15psi diff....so +6psi is very mild.

edit: It does connect to the obd2 port but it is not necessary. Not sure if it uses obd2 info for anything else if it connected.

 

They did. It’s the PC 55
Not 27

 

This was my response when your other PC didn’t work. I am glad the PC55 works with it though.

 

What size tires are you running and what % is the speedo off?

 

Running 37s. It’s about 3-5 mph off

 

Since I'm not a professional blogger I failed at getting any of the pertinent pictures or tech write up on my JB4 install. That being said I'll spare everyone the boring details and summarize. THe most difficult part was me locating the small step ladder I knew I had somewhere and needed desperately because this truck in stock trim is real tall. Otherwise the install was a 2 beer ordeal with breaks. Things I wish were altered, the harness could be a little longer so it doesn't drape awkwardly across the engine bay, maybe a few more inches (thats what she said) so it could tuck away a little cleaner. It says to just lay it next to the fuse block, which seems a little low rent so I had some small circular velcro pads from some random ass project at some time that I used to affix it to the side of the fuse block and keep it from rattling or bouncing around. Took me all of 2 minutes to download and register the app. Vehicle connected instantly, my dumb ass left a sensor unplugged...remember the 2 beers I mentioned earlier... so it had a CE light on, which the app read and cleared easily. I selected Map 1 and set out.

Immediately noticeable, boost comes on a little earlier and comes on hard. I was trying to read the screen gauges and contain my giggles and drive all at once so really all I saw was like 15 something psi but at what point I couldn't tell you, I'll report back. Chirps the tire on the 1-2 shift which will likely cause the trans to grenade here soon with the way I drive it. Here's where it's really noticeable though, before from a 40 or so punch it was stout but now it's filthy. 40-90++ is about as fun as I've had on 4 wheels in forever and that includes some high HP Fox body Mustangs years ago. This isn't a Raptor or TRX killer by any stretch but it's way more fun than a plebian Toyota truck should be. Couldn't be happier with the JB4 and if there was ever 93 offered where I live I'd turn up the map but for now Map 1 is making me smile every time I drive it.

 

I've purchased a JB4 for my last two vehicles ( both sportier than the tundra) and I was very pleased with the performance. Easy to install and easy to remove prior to dealer visits. Well made product and decent support. Considering one for the Tundra if it ever arrives.

 

Well written for a “non-professional blogger” I too wanted all the things you longer for. Forgive us regular citizens for wanting things to work logically.

 

Running oversized 34's (295/70/18 = 34.3") and my speedo is off by 5% so it varies by speed. It's a full 5 mph at 70.

I'm less concerned with the speedo being off than I am about the odo. 5% off on the speedo is also 5% on the odo tracking. Over the course of ownership on my truck, that'll add up to a huge difference between miles traveled and odo readout unless someone released a recalibration tool before too long.