Throttle mapping on 2023 with Manual tranny

Hi all,

I am curious about an issue (potential issue) with what may be throttle mapping concern.
The dealer (most senior tech) has been shown this issue & acknowledged the 'shake issue' but confirmed their answer is 'they don't touch' engine mapping.
Hence, looking to see if others have experienced the same issue and is there possibly an actual 'fix'.

Taco 2023 TRD Sport Manual
Purchased NEW 2023/10 & currently 17k kms.

Issue: Taco shakes when executing a 1st to 2nd gear shift with target~ light RPM/Speed
*2nd gear RPM at shift is landing <2k rpm (in 2-wheel drive mode with no load/tow).

Reproducing the issue:
When changing gears from 1 to 2 (manual) and the RPMs are relatively low (driving conservatively), the truck shakes as though it is starved for fuel. The shake/stutter goes away when rpms increase and pass 2k or so.
This does NOT happen when either; 1) pressing 'less' on the gas or 2) being more aggressive & pressing 'harder' on the gas pedal. SO, it's the 'in between' throttle position that results in shaking.

Note: Never experienced this issue with all my previous Manual/Stick vehicles-cars nor on borrowed SUV vehicles (1978 Ford Bronco truck with a 4 speed manual or 2008 Porsche Cayenne 6 speed manual).
FYI - this is my 1st pickup and the dealers that have serviced this truck to-date don't appear to have much experience with the Tacos especially ones with stick/manual tranny.

Thanks in advance to all

 

Tacoma shifts rough at low speeds especially when lugging like you are.

It needs revs and you need to accept that. I've had to tell 60 year olds that drove manuals their whole lives that shifting before 2500rpm doesnt do any good to the engine or drivetrain.

It's not a diesel or a big v8

 

It sounds like you are applying too much throttle at too low a rpm. If so, the solution is to raise the rpm or lower the throttle. All internal combustion engines do this if pushed beyond their happy place. The 2gr-fks likes more rpm than many others. It’s more of a soprano than a baritone.

FYI: I have no idea what you mean by “the truck shakes as though it is starved for fuel”. When an engine is not getting enough fuel, like when the tank is empty, it will quit running altogether, start again, stop, …, and then stop for good. No shaking. Caveat: all my experiences with running out of gas have been with carbureted engines.

When you refer to “throttle mapping” and “engine mapping”, I’m guessing you are referring to ECU tuning. You can have your ECU tuned by a number of aftermarket outlets, but not a dealer unless there is a TSB. It may or may not improve your experience.

Have someone else drive the truck and give their opinion about whether it’s normal or not. In the meantime, avoid the rpm and throttle setting that causes it. Your truck might be talking to you.

 

What others wrote. You "drive conservatively," mean you drive like old man. Step the gas and go, Toyota different, then other vehicles.

 

This engine has the off idle torque of a riding lawn mower and is nothing like the in line sixes and V8s of times gone by.

Once you get your head around the idea that the engine won't blow up if you pass 3000 RPM it is much more responsive and fun to drive.

You paid for the whole tachometer, don't be afraid to use it, as a general rule keep it over 2000 RPM.

It isn't necessary to drive faster or more aggressively, just stay in the lower gears and be conscious of keeping those RPMs up.