Tundra engine recall - interesting news

There are numerous threads about this. Most reports claim to have a random 1-2 second lag between pressing the throttle and the truck actually moving from a complete stop, or a slow rolling stop. It appears to be most frequent right after a cold startup and while trying to quickly accelerate.

There is a TSB out on it, but many claim it hasn't fixed their hesitation issues.

There also doesn't seem to be any rhyme or reason to what trucks are affected by it. My '23 has never done it in almost 30K miles, fortunately,

 

Yeah, mine have been rolling stops. The first time I was entering a turn lane ready to turn left and continued to creep forward. I attempted to accelerate and there was that 1-2 second lag. Thankfully the closest oncoming traffic was a good ways back. Thankfully it has only happened a few times in 20k miles. I've definitely learned to be cautious when turning to make sure I have lots of room in this truck.

 

at least its not a ford, HA

thats the same as any truck forum has ever been, lol. Just the way it is

this place is great though.

I have a list of improvements for the tundra as well, so not all of us think its 100% perfect, nothing is nor ever will be

 

Ah for the good old days when the gas pedal was just hooked up to the carb and didn't think it was smarter than you.

And before any one says they don't miss carbs. We still own and ride regularly 2 carb'd motorcycles, and my 1950 International, all 3 run great and never have issues with them, and none of them hesitate when I give it throttle.

And as I mentioned in another post, we're back to just lousy software programming. Seriously don't understand why manufacturers can't get something as simple as throttle response right, after all these years.

 

this is when I get it , slow rolling stops. I thought the signs said Slight Tap On Pedal (STOP) anyways

 

So is it trying to shutdown for a stop, gets confused, then starts back up? Has anyone who defeated the Auto Stop/Start experienced the lag?

Wife just bought a Mercedes GLE and it doesn't experience any kind of lag with its Auto Stop/Start, thought I would hate it, but it's actually not intrusive at all and you don't know it's doing it. This is a mild hybrid though with the electric motor between the engine and trans so you have immediate acceleration from the electric motor while it waits for the actual engine to start. I could see how the delay could happen waiting for a restart with only an ICE to work with

 

Yes

 

ya, its not that, that goes off every time as part of the pre-flight check list.

the motor doesn't shut off, there is just a slight delay in throttle, I think the most recent theory is its not downshifting into 1st fast enough or calling for boost instead of trans position or something, there is a dude in that thread who knows way more and did testing, etc. Im no expert on it at all, I only get it from time to time

 

Do you guys think it's possible to start/stop feature is to blame for the motors issues?

 

No.

 

Not likely. I think the vast majority of Gen 3 owners turn that stupid auto stop/start feature off every time they start their engines. I know I do.

 

But...for what it is worth, and I have ZERO clue of what's really going on. The vast majority of 3rd gen owners are not having engines go.....??? And the owners manual says to let the engine idle for sometime (~1 minute) before shutting it down. But if its always shutting down at stop lights...wouldn't that be bad....??? Especially after driving highway???

 

For sure, my Ecoboost circulates coolant after shutdown to help cool turbos, but I have always let any engine idle for at least 30 secs to a minute after working. My tractor, motorcycles, they all get idled, only thing I don't bother idling is my pressure washer.

This whole stop/start thing is about saving pennies of fuel, NOT engine longevity.

 

Toyota has blamed it on transmission ecu programming. Makes sense. I’m willing to bet the truck is programmed to start in 2nd or 3rd gear for efficiency. When you stab the gas, it has to decide upon a gear to down shift to (1st or 2nd?) execute the shift and then add the power requested. The computers and the drive by wire take the slamming in and out of gears away, but create throttle lag. Daughters 9 speed ZF has some lag and poor gear choice maneuvers at times. Dern EPA. Does sport mode help take away the lag? Manually selected 1st gear to start?