Hesitation during low RPM acceleration

04B10 was a very early '16 calibration FWIW.
You can use techstream, vF software or a OBD scanner (Mode $09 info on the scanner) to view the calibration version.
Each model year has at least one calibration version (different for M/T and A/T too).

 

You are either 04B90 or 04B91

 

Are there tune packs for either of those?

 

Yep sure is

 

It seems that 04B05 and 04B42 might be the only two without TPs at this point?

Still no TSB for the 2016 - 2018 ATs either. Just a report that replacement ECUs are shipping with 04B05.

 

2023 TRD Pro 6MT. Had the truck for two weeks today. For the first 3-4 minutes after cold startup, the truck cuts the power very briefly, just a stutter. Haven't noticed it when it's warm, but it's very apparent those first few minutes always at low rpm's while the throttle is being applied. Going to take it to the dealership and have them take a look.

 

My truck does that as well, especially before it is fully warmed up, but still does it after fully warmed up. I have had OV tune and currently KDMax - they help, but it still runs funny. I also get horrendous gas mileage (16 or so with mostly highway miles).

Every once in a while the truck acts "normal" - Out of the blue, the fuel mileage will pick up on a specific trip, the throttle feels great, and it has plenty of power. Then, the very next time I get in it (after a stop while running errands - so same fuel, same weather, same everything), it goes back to it's weird self. I really wish I understood it.

 

You might just be giving it too much gas for the RPM's listed, this truck likes to be revved and doesn't like to lug in low RPM's (<1500 RPM's). 3500 RPM isn't far outside my normal shift range, usually it's around there for 1-2, maybe 2500-3000 RPM's shifts from there on up. Sub 1500 RPM's feels like lugging the motor with anything more than like 10% throttle. 1500-2500 RPM's, I personally don't use more than like 30-40% throttle ever, and if I need to, I downshift, runs smooth. WOT is reserved for 3500 RPM's to redline.

I know some people have legitimate issues with hesitation, I haven't experienced it myself so there certainly could be something going on there. But if you're trying to accelerate at anything faster than a snails pace at <1500 RPM's, you're going to have a bad time. Same characteristics as any 4 or 6 cylinder manual I've ever owned, they don't make power down that low.

 

mine does this when cold. feels like a misfire but throws no codes. actually felt more noticeable with ECT mode on.

 

Not making power is one thing - hesitating like an old carbureted Chevy with a cold engine and a non-operating choke is another. I have not experienced this in any other modern vehicle especially without throwing a code and don't drive it any differently than any other vehicle in the past. My truck even does this (though to a lesser degree) at around 2500-3000 RPMS accelerating onto the highway before the engine is fully up to temperature. I have come to just accept that this is the way it is.
I should mention that I have tried all of the TSB's, OV Tune and currently running the KDMax tune. The KDMax improved the hesitation, but it is still there.

 

You guys got some weird running trucks. I've got the latest factory tune in my 2020, and it's a rocket. No hesitation, or stumbling. It just goes every time you tell it to...cold, or up to temp. The only deal before getting up to temp is it will stay in 5th gear longer than I'd like.

 

I would love to know what is the cause of the variability with the way these things run. Like I said previously, every once in a while (maybe 1 out of every 30 trips or so) the truck runs like a champ - great power, no hesitation, and decent fuel mileage. I'll go into a store and jump back in my truck 5-10 min later and it goes back to the way it feels most of the time. So weird.

 

Driving environment(terrain, speed limit, traffic) and the state of the transmission (gear, torque converter) and the throttle input.

 

the AI decides how the truck will run. sometimes it's a bit grumpy i guess.

 

Right. But for my truck, every once in a while with the same weather, same route, same fuel, etc. the truck behaves differently just turning the truck off for 10 min.

 

yea, it's dynamic and changes depending on conditions

 

There is a dozen of tables that contribute to shifting logic. Some of them engine temperature related. Also VSC has some input on the throttle-->torque-->shifting.
ACIS contributes to shifting.
The worst contributor is torque converter logic with a restricted throttle.
Once you see all these parameters in real-time, you will understand the root cause of some of those inconsistencies

 

Good thing my truck is a manual

 

Everything you have described is exactly what I’ve experienced with my truck since I bought it! I thought I was alone in having a Taco that was “extra special” Every time I drive it it’s different! No two drives are the same and once or twice a month it drives “normally” By normal I mean better than the 2003 Chevy work truck I’ve been driving a bit lately. What’s funny is every time it’s running really well I hate to shut it off because even ten minutes later restarting it will drive like shit again. I believe there are two layers of people who have problems with these trucks- those who complain about minor driving characteristics of properly functioning trucks, and those with Tacomas that actually have defects. Those with actual issues get drowned out with suggestions of “get a Tune”, ECT and ETC. My truck doesn’t need a tune. I know it’s capable of running perfectly fine because IT DOES SO like once or twice a month on random drives. This truck boggles the mind.

 

Crazy, isn't it? I feel the same way about shutting it off when it is running good!