2013 TRD Magnuson Oddity

Here's a question that I also have floating around ToyotaNation, but I figure to give it a shot here as well...

I have a 2013 Tacoma TRD Off-Road 4.0 V6 automatic which recently (within the last few months), received a Magnuson 1GR-FE supercharger installation. Something odd has happened twice...

There are no problems as long as I keep the transmission in D, regardless of how brutal I am with the throttle, but when I manually shift it down to D4 too often for passing, an MAF related DTC appears.

This happened for the first time during the initial shakedown after installation. Returning it to the installer resulted in receiving new files from Bullydog as it was believed that they hadn't prepared the sensor properly for the increased air flow. Note, this was before I'd managed to make the association with the manual shifting. I had thought at that time it was simply a random issue. One updated reprogram later had me rolling again.

The problem seemed to go away, hooray. I, for lack of any real reason, stayed away from manual shifting. Cut to this morning, where in a fit of whimsy, I drove to work under manual control of the gearbox. This caused the MAF DTC to appear once again.

There seems to be no performance degradation with this error is thrown. The vehicle runs fine. Both the installer and Bullydog claimed that it's a misread on the part of the MAF, and not truly a problem. I worry that the engine might be running lean at the very worst.

So there's my question -- has anyone had experience with Bullydog coding, whether or not it involves the Maggie? Is it inflexible to the point of becoming confused when put to manual shifting as opposed to its own automatic schema? Is there something else I might want to investigate?

Thank you.


Additionally, as of yesterday...

Eh, still collecting data on this issue. It's definitely shift-related, though. So far I've had the vehicle be stuck in 4th after manually shifting -- changing to neutral and back to D finally popped it into 5th. I've also seen the vehicle not automatically downshift when attempting to pass.

The error is p0101 -- not the p0103 as was suggested by the installer. Interesting. I'm going to flash back to stock shift points and see what that does.

I've also noticed that the throttle is set to 30% at the mid-way pedal position and maxing out at 64% on the floor. I see by the Dog's documentation that this is its default setting. Is that also standard with a stock Tacoma? I can't seem to find good documentation on that.

Throttle adjustments are not available on the fly, but the coder's documentation suggests that I should be able to change to 50/100. I'll see if it's an option on the flash, but so far I have not found any demos of users doing that.

Please let me know if anyone has experience with this sort of thing. I may try chasing down either a Maggie or Bully Dog forum for additional support.

 

Just installed mine last week with the BD tune. So far no issues with manual shifting. But I ditched the K&N fir an AFE dry filter.

Are you running the oiled K&N filter that came with the SC? Clean your MAF sensor, disconnect the negative lead on the battery for 15-30 minutes and try the stock paper air filter for a tank of gas and see what happens.

 

Nice to know someone's running the same-ish setup as me. I have to admit, of all the things I thought might go wrong, I would not have expected K&N to betray me. That is what I still have slotted.

Let's talk coding for a minute. I did try to re-flash this morning, but the LiON Smartcharger I use only takes the battery to 12.0, which it precisely one cat-fart's width from the 12.1 BD insists on seeing. I'll have to bum a real battery booster from someone and give it another shot.

I do know that it listed the 2010-2014 Tacoma as the vehicle of choice. Which is good, since that's what I have. Unfortunately, it also thought that I ran a 3.5l engine. No, it's a 4.0l TRD Off-Road. I did adjust that manually after the fact.

That's a troubling sign, though. Does my card not know what I drive? Did you have to adjust your engine size, or did it register correctly up front?

Also -- throttle positioning. Are you getting WOT? Did you have to tell your BD to go 50% at the half-way point, overriding its base 30%? Or was that something which didn't even come up?

Oh. And a dealer tune seems to be out at this point. We have precisely one Toyota lot around here, and it's a big one, but they're sticking to the Toyota mandate of not touching 2nd gen mods, especially for anyone who installed the Maggie version of their TRD blower. Those jerks.

 

Wow... I had no idea that there was such a controversy over these K&N oiled filters. Whenever a company has to spend THAT much effort in denying a problem, that's a pretty good sign that there's a problem.

Here's a guy who seemed to have the exact same trouble as myself, and also blamed filter oil. There was at least one other driver who also claimed to be seeing tranny issues crop up from the same source. I suppose that's possible...

So I know what I'll be doing this weekend.

Which only leaves the question of your throttle positioning and the registered engine size that came out of your original programming. Are you able to achieve WOT, and did the vehicle description show 3.5l or 4.0l?

 

I'm running the Magnuson
I'd ditch the K&N for a pro dry set up and definitely ditch the bully dog. Have it flashed by Toyota
Also I would highly recommend getting a 255 fuel pump
Urd sells a kit under $200
Potentially Save your motors life

 

I suppose I could hold a gun to the dealership's head and force them to load a second generation TRD S/C flash, but so far asking nicely and offering to pay has resulted in receiving the bureaucratic equivalent of a middle finger, while at the same time waving official Toyota documentation telling them not to acknowledge the existence of such a thing.

I'll call that Plan B.

K&N will be gone today, and the MAF will be cleaned over the weekend. So what's the story with the stock fuel pump? Is it plotting to push a nest of bees into my injectors? 'Honestly wouldn't surprise me at this point.

 

Well as far as the fuel pump the stock ones don't have a filter just the little sock at the inlet they get clogged... long story short the fuel pressure can Drop under boost and pop goes the 4.0
Gadget at urd says it's the Most common reason for blowing up supercharged 4.0's
The new kit comes with an inline filter and is just much more capable of maintains adequate fuel pressure
Any other dealers you could try? Mine was totally cool about it. Weird how different they can be, some are dickheads it sounds like.
It'd be worth a few hour road trip in my opinion...
My truck has been problem free with the flash!
Hope you work it out man

 

Ah, but there have also been people tuned with BD who haven't had problems, either. I'll start with cleaning up the MAF and seeing if that handles things before kicking around for a TRD flash.

Getting a real fuel filter is definitely on the list as well -- thanks for the warning on that one.

 

No point in holding a gun to their head... Toyota will not be able to write over the BD calibration file even if you uninstall.

 

Well, then, onward to making sure that I'm not being Bullied into poor performance here. I'm still hoping that DelScorcho can come back soon and let me know what his experiences were with the GT Platinum coding.

 

Have you checked the freeze time data/LTFT?

 

I have not. BD does not even read transient A/F without additional gear (just like their pyros). I can have them pulled before disconnecting the battery for the MAF cleaning. I wouldn't expect a problem to be there without a P017* code, though.

Is there something specific you have in mind within the laundry list of potential headaches that could be indicated by fuel trim?

 

Do you have a wideband?

If no I'd definitely make this purchase.

 

That sounds a little excessive. Since I'm not going for weekend shootouts, would constant wideband monitoring really be all that critical?

 

Damn... the more I read, the more I'm convinced it's the MAF causing me problems. My gas mileage has been steadily creeping downwards towards 15. I had been attributing that to beating the throttle like a rented Camry, but now I'm starting to wonder. Seeing as how dirty/failing MAFs can also screw with shift points, at least potentially, and I'll be damned if the K&N isn't a likely culprit.

Now, someone get 'Scorch back in here to talk about BD tunes!

 

There was no 3.5L available to choose from when I downloaded the BD tune. I'm not running the BD tuner. I still have a scanguage installed, I'll take a look next time I'm out.

 

Not sure what year your truck is, but this might be an option

https://www.tacomaworld.com/threads...-trd-supercharger-flash.490099/#post-15206124

 

I had asked this question in another thread. I was curious if Toyota would still flash ECU's for a Magnusen SC'er and others have apparently found dealers willing to do this. Maybe check another dealer? I still am investigating a SC'er for my '13 and your issues with the BD tune are not inspiring confidence.

Here is the other thread:

https://www.tacomaworld.com/threads/magnusen-supercharger.487276/#post-14963617

 

Once you've used the bully dog tune the dealer won't be able to flash the trd tune.

I think your issue is definitely the oiled filter.
And definitely get a wideband afr gauge. No sc should be installed without one. No matter if youre getting groceries or racing. You're flying blind without it.

 

https://www.tacomaworld.com/threads/closed-20-off-supercharger-group-buy-2nd-gen-4-0-engine.454464/

Here's lots of reading for you.