2016 OVTune Tacoma 3.5L Manual Transmission / Engine ECU Reflash

I haven’t yet but will take special attention on next trip.
Other than that this tune is still rocking

 

I have, pretty consistently. I haven't put that many miles on it though.

 

Stock tune and 87fob have that flat spot for me. Beta still need to drive more. But my initial impressions of tune is awesome.

I really think this is just a dead low torque zone in this drivetrain pushing a moderately heavy vehicle. This motor screams in a camry however...

 

Getting a tune during the week makes it hard to rack up miles. I am just over 60, sadly.

This is my feedback so far:

Version 21175 87 tune. No driveline mods or breathing mods other than a pre-axle dump, removed secondary air filter, and ADM.

I loaded both 21150 and 21175. Since I never felt the dead pedal, I just wanted to know. It wasn't bad right after the flash on a hot motor, but the delay on a cold start was looong.

21175 feels like the first 2.0 Beta (about 2,000mi total) but with a lot of subtle but noticeable changes:

-- Smoother
-- Reduced rev hang
-- More torque down low - I don't think that I am missing FOB any more, but a FO 2.0 would be fun to try?
-- Slightly different and good exhaust note
-- More refined overall
-- What seems like a bit more engine braking?
-- Zero negatives other than some valve knock when letting off the throttle (higher load / low RPM) - that was greatly reduced with miles on the first Beta

My MPGs are down a bit, but it is too early to make that evaluation for sure.

The first Beta seemed to take a very long time to stop settling, approx 1,000mi, which is much longer than I saw with 1.05 tunes. So, a full evaluation for 21175 might take a while.

In the end, 2.0 really rocks. The feel and consistency in the tune make for happy MT driving. Thanks for all the effort!


Ticket Number 10117.

 

I might have said (very quietly in my mind) that it feels like a car motor now. Once, I checked the tach to be sure it was still running.

Small but noticeable changes!

 

im kinda curious if mat can explain what is happening with the engine at 1500 rpm. I dont have the tune, but plan to get it before the end of the year. The thing that drives me nuts is 1500 rpm.

If you are under 1500 and accelerate, right at 1500 the truck stumbles hard and bucks especially in 2nd gear, then takes off quite well.

When engine braking, once the rpms hit 1500 rpm, it feels like you punched the throttle really quick. it lunges forward and then starts engine braking again. Sometimes in stop and go traffic i will not shift from first gear, then its a constant battle with staying under, or over 1500 to stop this nonsense.

also, does the tune do anything for this?

 

Must still be on stock tune. It's operating within Toyota's parameters. I pity the foo.

DFCO maybe?

 

the engine braking part is known as DEFCO: deceleration fuel cutoff.

it changes with the tune and is reduced while proper engine braking, although minimal, is increased from stock.

the first part you refer to honestly sounds more like the typical throttle & clutch weirdness that every non-tuned and non-ADM truck seems to report.

now to get the tune and forget about the shit stock tune . nobody needs to remember it.

and do your ADM.

 

we are on the same page exactly.

 

so you're telling me that if i let off the throttle at 4k rpm (engine braking) that it doesnt cut fuel until 1500 rpm? that sounds ridiculous, or do you mean that at 1500 rpm it reapplies fuel?

and yes im on stock tune (i bought a softopper instead, oops) i do plan on buying it, im just stingy with my money.

as for accelerating, it does this without me using the clutch, so thats not it.

 

On a side note, my OV dump tubes are about to be shipped. Really wondering how these are going to improve performance with the manual trans.
Funny side story, I put long tube headers on my 2nd gen and after 5 years sold the cats to help pay for an engagement ring for my now wife.
Ned

 

Took a min to find it but this is what DFCO does.

Majority of the quirks has been mitigated by OVTune. Especially when in 1st / 2nd gear when you want to accelerate but the truck can't decide what to do. Then goes balls to the walls after a few seconds.

This explains why it does it: https://www.ovtuned.com/blogs/news/...-tacoma-transmission-and-how-we-are-fixing-it

 

I mimic what other have said about 2.0 v2
If this was a full release I would happy as a clam. Well done ovtune!

I'm still curious about that single torque map though

 

Thank you. This is what i wanted to know. The better it sounds the more likely I'll buy it sooner than later.

 

this 1500 accelerating thing you describe doesn't make sense to me. all tunes incl stock have a surge at 3500rpm as the timing advances. but you are not referring to that? i never had a surge except for the 3500rpm one, which the 2.0 tune FINALLY does away with.

 

IMHO, at 1500 rpm you're pretty close to lug the engine, and that's kind of what he feels, stuttering and then taking off as he gives more throttle.

 

i see. i habitually spin up now, so if that's the case i just never see it any longer from how i drive.

 

So, it's not the 3500 rpm surge. I don't get bothered with that as i know it's normal from reading ovtune threads etc.

Also don't confuse "acceleration" with me trying to go fast from under 1500 rpm. I'm talking slow acceleration for normal respectful driving. The truck is moving already, not stopped.

We all have driven manual transmission for a while so i don't think I'm the only one who cruises around in 2nd gear at low speed, then doesn't shift to first when acceleration is needed. It's a rough shift, especially with throttle lag and these being so difficult to rev match.

I only reference 2nd because i don't ever cruise 3rd, 4th etc at that low. 1st gear is your get going gear, once moving you shouldn't really need it unless you are on a incline. Hell, my civics and 22re 4 runner, i can take off in 2nd no problem, except on a hill of course.

It's just funny that both these things happen at exactly 1500 rpm no matter what scenario. I was just curious if there is some sort of "change over" that happens in that range. Atkinson to Otto? AC clutch disengaging for load demand? Who knows

 

I live at altitude (~5300') and I notice it most during the winter, but have had it happen infrequently during the summer as well. The truck will intermittently hesitate/stumble while accelerating, it feels like I let off the gas for a second and then step back on it, it lasts for a split second and then drives normal again. It does not have to be from a stop.

I usually shift from 1st to 2nd and from 2nd to 3rd around 3k rpms, which will drop the rpms down to ~1500 after shifting; right around and only around ~1500 rpms does the hesitation happen (I have not noticed it happening any other time), but not every time, only randomly.

I've noticed it most during the winter months, I don't get any codes/CELs, I've tried different octanes (86, 91) from different gas stations (costco, conoco), I've made sure there are no air leaks in the intake system, I do not have any engine mods, it doesn't matter if the truck is cold or fully warmed up, it doesn't matter if I'm on a hill, flat ground, turning, or going straight. The truck has never stalled from this, and this is happening on a normal paved road that is not slick or iced.

Took it to the dealer and he told me that this was normal operation of the Otto/Atkinson motor and that I was shifting too low (I normally shift around 3k rpm)... Basically, if I didn’t want to feel the hesitation, I need to rev it out more so the needle doesn’t drop below 1500 rpm between shifts. He said that that must be where the motor is switching over from Otto to Atkinson and for whatever reason (outside temp, throttle position, etc) the motor stumbles right there.

I had done the transmission tsb but I still had the same problem; however, since flashing OVTune I haven't had this happen (that being said, I just recently got the tune and have not driven in cold weather with it yet... I'm anxiously awaiting this winter).

 

Good posts to read for those on the fence purchasing ovtune.

When I bought my tacoma new a year ago, getting used to the laggy stumble nature of the beast took some time. And the truck really didn't wake up til 4000 miles or so. Even after a good break in I felt the tune needed some help.

Let's just say I waited to long to buy the tune.. Don't hesitate, buy it! The more manual support for these guys the better