JB4

I'm running the tuner on my non hybrid SR5. Lag is still there until the motor is up to temp. Totally worth the money in my opinion.
I'm going to note though I had my truck detailed. The guy did an amazing job but went under the hood. Tuner got wet. No damage to the tuner but the Bluetooth connector got fried the next day. Truck shut down on me and threw 3 codes. I was able to erase 3 of them. There was a hard code of no power to PCM that only the dealer can delete. U0100 I think it is off memory. I had to uninstall the tuner on the side of the road to get the truck going again.

I reinstalled when the new Bluetooth connector came in. No issues. But that week without it made me really miss the tune. Just installed the bms blowoff valves with it this time.


For this saying it's a pain to disconnect. If you approach the motor with your head on the passenger side you can get a clear view of the clip. Take one of those cheap jimmy bars with a 90 on it and stick it in there to apply pressure to the clip tab. Reach in with your left hand and apply the pressure towards the firewall. So much easier then cramming both hands in there trying to release the tab in the blind.

 

Is there a performance element to the blow off valves? Or are they only for sound?

 

Pretty much just sound. The BMS valves have 4 Allen....keys I'm going to call them. All 4 removed will be the loadest. They suggested starting with 2 out and going from there. That's what I'm running now. I can hear the turbo whistle a little loader now and the Blow off wosssh sound. Not annoyingly load but enough for some pleasure. There was a YouTube guy that said it stalled his truck,. But I'm wondering if he had the wastegate issue. I might remove another key next week and see if I like the sound difference or maintain.

 

https://www.homedepot.com/p/Dasco-Pro-Pry-Bar-Set-3-Piece-91/202585548

I used the bigger one in this set that I already had. And when I take it to the dealer I remove the tuner. It's not to bad after the second-3rd time doing it. That back clip is the hardest part. I just tuck my ob2 power plug up in the dash and leave the power cord going through the firewall.

How did I know it's a hard code? I used a scanner,. Not the jb4 to pull the codes. It wouldn't let me earase it and was marked "permanent" on my scanner. I only take my truck back to the dealer for recalls. The Toyota dealers around me don't do service work that fits my schedule. The cutoff is 430 for appointments, and I never really know where I'm going to be on what day. So I get my oil changes at Valvoline drive through. Only if there was a major mechanical issue would I take it back in for the warranty. But 25k on my truck and nothing major. Just the same issues everyone else has complained about that Toyota doesn't have resolutions for. Wind noise, infotainment disconnecting ect.

 

That was mark brenner....complete tool.

 

Why do you say that? My BOV stalled my truck too and put it into safety mode. I like Mark.

 

Why does it stall the truck?

 

Because the air is metered by the MAF sensors pre-turbo, and the OEM setup is to recirc the air back into the closed system. When you add aftermarket BOV, you are releasing metered air that was accounted for by the system into the atmosphere and it can cause a stall. This is why the BOV is adjustable, not only for sound but to find the amount of metered air you can release without causing a stumble.

 

Can confirm that the BMS valve spacers stalled out my truck also. Ran them for a week and had several instances where it would limp the engine to shut off

 

I envy the ability to make a bunch more power just by plugging in this module/getting tuned. If I had one I’d struggle to resist!

Word to the wise though, if the JB4 comes with stickers don’t put them on! Saw a dude on Facebook had 3 bearing failures on his engine at 16k miles. He had the JB4 on previously, but removed 3 months prior to the failure, and it was removed when he brought it in. They refused to cover the engine under warranty due to the JB4 sticker and it cost him 25k to repair out of pocket. Sounds like they didn’t even bother trying to dig deeper and prove it was tuned by other means. I’d be pissed.

 

Sticker or not, if they check the data log it will show up like stated by another member.

 

The dude on FB must be lying. I doubt a dealer could void a warranty because of sticker you put on your truck. Maybe you had a JB4 on your other car who knows. As it has been stated they can pull the logs and see there is something nefarious going on. a sticker aint it.

 

I don’t know, I’m just relaying what he posted in hopes that no one else has the same issue. It’s clear the JB4 is on Toyotas radar if there is an engine failure. You can judge for yourself I guess.

 

I have eco on map 0, normal on map 2, sport map3, tow map 2. I haven't personally dipped into ethanol. I have 93 octane in abundance around me so I can get away with those map settings. Some areas a hear can only get 91.

As far as the ethanol and why I haven't dipped into those settings. I don't know if the injectors can handle that much fuel. I do know you don't want to really push them more then 80% efficiency. The other thing that worries me is I don't know what seals Toyota has in its fuel system. Flex fuel vehicles use seals that can withstand the higher ethanol %. If the seals can't handle the ethanol I've been told it will break down the seals and creat leaks/pressure issues. Is this true? I can't 100% confirm. But it made enough sense to me to stay clear of it. I'm happy with the results I'm getting. My truck on map 2 won't pin you in the seat....but it will definitely knock you back in your seat.

And as far as mark goes ges an enthusiastic motorhead with minimal experience. I'm not going to say I dislike him. But anything he said I would value another opinion. He has money to play with and I can judge certain things off his results.

The BMS valves for me have been on for 3 days now. I haven't had any issues. But I am running half the set screws on higher boost. I don't believe Brenner had any extra boost. Does this play an effect? To early to tell. Tomorrow I have a 70 mile drive each way to work. I guess that will be the true test.

 

I want to add ECO mode I think is complete garbage on this truck. I get better fuel economy and performance on normal.

I'm not sure if anyone else has noticed but this 10 speed transmission isn't really a ten speed. My truck will go to 9th gear no problem. Very rarely does it ever go into tenth.
With or without a tuner. I'm in Ohio with a lot of hills/ mountains. Next week I'll be driving to Illinois for a relatives wedding. Indian has a lot of flat ground so maybe that's playing a roll. I'll make sure to reply with my results.
I switch the truck to manual shift to try and find the gear it's in....if I go to 10 the truck doesn't always advance to 10. I've done this at 60,70, and 80. Mph. When I downshift from there it typically goes to 8 which tells me the truck was in 9. A couple times it's shifted to 9 from 10. But the rpm difference from 9 to 10 is so minimal it's not even worth complaining about.

 

Link to thread? I'm kinda curious to what you found

 

Just chiming in that my experience with the ECO setting is exactly the same.

 

Here’s an informative video explaining ethanol fuel relating to power, efficiency, and turbos.

https://m.youtube.com/watch?v=6_DQPLihXfo

 

because he slapped them on w/o any of the vents plugged...it stalled and he didnt try plugging vents at all. The spacers are adjustable for a reason....some trucks will run fine w/o any vents plugged, some need 2 or 3 vents plugged...depends. The majority (If not all) of people who report problems, didnt try plugging until it wouldnt stall.

I have a set and it did stall 2 times, once 35 miles after install and then again 1k miles later. This was before the 22TC08 recall which addressed the same conditions where I was stalling...once I got the updated ECU programming (7/22), it never stalled again.

 

Wrong. I have it and friends at a local dealership. Nothing shows.

 

When we bought them we were told the screws were for how much sound you wanted. More screws less sound. We were told that our truck wouldn’t without the screws. We were told it that is the loudest configuration.

Why even have that option if it cripples the truck is the real question.

Hardly a tool for testing out a part and getting bad information from the manufacturer.

 

By we, you mean beta testers? Because I beta tested and was never told it was for sound.

 

Wrong. Someone always has a friend of a friend. It’s called data log. The ecm will data log that the truck was boosting 30# vs 20#, timing was advanced and extra fuel was added. Regardless, you want to make your truck .1-.3 secs faster to race your shadow, than have at it. Blowing up a $50-70k truck for a few pony’s isn’t worth it to me anymore. Been there done that and got a cookie.

 

This is a misleading statement. Nothing may show to the dealer, but the dealer is not who would provide authorization for an engine replacement under warranty. If you blow an engine, the data logs will be sent to Texas to the team of engineers to review before any authorization is given. While they may not see a "blinking neon sign" that a tuner or inline signal modifier was installed, they will look at timing, MAF sensor readings, boost and airflow, fuel consumption, etc. and they will be able to see that something likely was happening because the engine was operating outside the "normal parameters" of the data tables in the computer. logged boost level vs. MAF sensor readings will look funny to them.

 

Update with my blowoff valve experience. I've had them on now for roughly two weeks. Two set screws in each. No issues. Im not going to remove anymore. I drove from Ohio to Illinois and back.
Another note though I did put some Lucus synthetic oil stabilizer in with the last oil change.My mpgs were falling off on each tank slowly. My mpgs have jumped from 17mpg to just under 19mpg. I have my truck monitor each tank rather than average. My truck is pushed at 80-85mph a lot of the time. I do speed. Thought I'd share.

 

How are you liking the sound? Love my bov plates

 

I'm liking it.....it's very faint with the windows up but when I'm out playing with the windows down it makes it a lil funner. I think I have it set up now with the perfect balance for my enjoyment.

 

So is everyone’s experience just on Map 5? Or who is conservatively running it daily on just Map 2 for a non-Hybrid?

 

I run Map 0 on Eco, Map 2 on Normal drive mode, and Map 3 on Sport mode. Without putting mixing to E30, I don't want to go to to any higher boosts. That being said, Map 3 on Sport mode is awesome!

 

Wait I thought Map3 required some mix of e-85?