Attention’22 6mt Owners

I would imagine the torque converter on the autos could mask that enough to not feel it vs a manual trans, especially since it's unlocked down low at the conditions where the problems are happening. That said, not all of the manuals have problems either, or at least that's how it comes across from the info others report about theirs.

 

I have this issue in my '22 6MT as well. I notice it in 3rd the most as that's the gear I seem to accelerate the most in cold. It hasn't always been constant, but like clockwork does it all the time now. It's always been super noticeable in any gear with the AC on. I attribute that to it being a manual and you feel it way more being directly connected. I had a '21 automatic and it was just slower with the AC on. This manual will almost feel like you let the clutch out weird. Going to try some 89 fuel and treatment, maybe I got some crappy gas. I had been using E15 88 octane recently as its been 80 cents cheaper. I wonder if the truck just needs to re-adjust the fueling tables.

 

Now, I’m just throwing this out there… make sure the maf engine side air intake hoses are tight. Just say no to vacuum leaks. Good luck, suckers

 

The truck will adjust very quickly by itself in response to higher octane fuel. Basically if the knock sensors are not detecting knock the computer starts pushing up the timing. More timing = more power. I would definitely try a tank of premium. Let me just put it this way, even at 96 octane I still see a minor amount of knock feedback with LSPI or low speed pre-ignition. In other words, light throttle, low rpm, but under load. You are better off putting your foot down to help eliminate / running higher octane fuel. If I see it at 96 octane, although just a minor amount, imagine what you are experiencing with low octane. It’s a high compression engine.

if you don’t want to tune the truck also consider a pedal commander or throttle controller. This will help eliminate some LSPI by opening the throttle body faster and allowing more fuel. I know they get a bad wrap from many people but I love mine and actually use it in conjunction with my tune. The reason why is I can lower the pedal sensitivity for my wife as she has a bit of hard time with the tuned sensitivity, lol. Anyway, just never adjust the settings while on the throttle. This is where people run into trouble.

 

Might want to clarify on your title because both manual and auto are 6 speeds.

 

I guess “sounded and felt like” mean the same as “actually are and totally happened” these days. I appreciate you leaving my pitiful grammar and butchery of the English language alone though.

 

Maybe I'm reading wrong, you're suggesting to help reduce knocking/pre-ignition when at low RPM by using more throttle?

 

Correct. At least this is what I see on my truck. When I’m a bit heavier on the throttle I see less knock feedback on initial acceleration. This video is pretty interesting as well. Although I did not really think about it you also may want to consider a different / heavier weight oil. If you are in fact experiencing LSPI. I personally run 0w-40 mobile 1 European Formula. For the money, it’s a fantastic oil.

https://youtu.be/8Rbcx84B1fw?si=Keac2w9iZ-CBmHCA

 

Well, this thread is getting crazy. OP might be having some issues, not sure. It's a manual transmission. These trucks will buck and jerk if the RPM's are not high enough. They all come factory with throttle delay,,, which sucks.. get a tune, pedal commander, sprint booster, whatever to do away with that.These MT trucks run better with a little more RPM.. 1st gear I get close to 3k, 2nd and 3rd... yep... about or close to 3k RPM.. put your foot in it a little more, wind it up a bit. Smooth shifting and driving.. rev up to down shift. Even at 60.. Aye! Yes. I have driven MT's all my life. I'm 56.. you have to rev up to down shift smoothly. Even at 60 AYE?.. "poke at an earlier comment". It's a MT. Drive it like you are supposed to. Can't lug it.. these trucks WILL buck. Step on it and go. Should be able to make it almost as smooth as an automatic. If not... you weren't taught to drive a MT correctly. Sorry just saying.. and it's not even Friday yet. and I don't know how to make the raining crap with umbrella emoji.. lol or I would have done that too... how in the hell do you guys do all that?.. I'm old school

 

When you hear knocking, don’t look behind you.

 

Good video covering the basics of pre-ignition. Never thought about how oil type would be a factor. With that said, it didn't address your comment about how adding throttle would reduce it from happening. Based on my experience and everything I've read, more throttle during low RPM is one of the factors of pre-ignition as now you're possibly lugging the motor and adding more load.

 

What you are describing is detonation, not pre-ignition. Trust me, if your engine was suffering from pre-ignition, then you wouldn't have an engine any more.

 

Sure, but with both instances of unwanted explosions whether we're before or after top tead center I'm failing to understand how adding more throttle is helpful.

 

Huge oversimplification; not sure you want a full breakdown. Regarding detonation and throttle opening; all else being equal (i.e. load and RPM), then opening the throttle more will increase the incidence of detonation.

 

We're absolutely agreeing here.

I had quoted a post where it was suggested that adding more throttle helped alleviate pre-ignition.

 

I agree with other sentiments. After doing some more research I believe it’s lugging and not LSPI.

 

I love these threads where the OP describes a perceived issue in overly vague words and we all jump on root causes before asking the OP questions to improve our understanding of the issue.

OP, I have questions before I take a wild guess at the root cause…

Can you describe the behavior in greater detail? What do you mean by “stutter”? If you are describing an oscillation (aka vibration), which plane is it in? Forward-backward? Up-down? Side to side? Is there any noise?

How many automobiles with manual transmissions have you driven and what were they?

What is the relationship between the throttle setting and engine RPM when the behavior occurs?

Is the truck modified in any way?

What are the qualifications of the “Toyota expert”?

Have you had a friend or trusted mechanic drive the truck and give you feedback?

I suggest adjusting the thread title, because both the automatic and the manual are 6 speeds. The manual is often called the 6mt. The Click on "Thread Tools" in the upper right and select "Edit Title".

 

Wow! You guys are sensitive! Seriously insulting my MT 6speed “NOT AUTO” Guy thats 56 yrs all his life! Pretty impressive! I’m 68 me too! Dirt bikes since I was 10. Stutter not vibration 1500 to 2600 RPM not as severe as the old carburetor pop or cracked distributor cap miss. List; VW Beetle, several Mopar 4 speeds, several Ford trucks MT, Subuaru Loyales and Legacys, Street bikes and so on. BTW there are others with the same issues. Maybe none of us know how to drive a 6mt…. I’m just trying to figure out why my Tacoma does this. Give me a break!

 

Oh I forgot I have a 2012 Tacoma 6mt also.