Misfire???

Hello, fellow 3rd Gen Toyota enthusiasts,

I have a question and could use some advice.

Today, I revved my engine while in park, (2024 Tundra with 4600 miles) and as soon as it hit 4000 RPM, it started to shudder (kind of like it was misfiring). Is this normal? I’m not sure, and I'm hoping someone here might know. I can post a video of what my truck was doing if that helps. Thanks!

 

What’s the current mileage on your truck?

 

Model Year 2024 - 4689 miles

 

Was the engine warmed up already?

 

Yes sir. Just came home from a 10 miles drive

 

If it's misfiring the computer should be detecting it. Take it in and have them scan it.

 

Did it go in to limp mode. Check engine light come on.

 

Not sure if anyone else is revving theirs while parked, but could be a rev limiter kicking in?

 

Yes sir. Going in tomorrow BUT, if you don't mind, if you have a 2022+ can you test and see if yours does this?

 

Rev limiter.

 

So it is normal?

 

yep rev limiter to keep dumbasses from blowing the motor by over-revving it in park or neutral

 

I guess I am one of those aforementioned dumbasses....

 

But would this explain the shuddering? The truck shakes and the engine seems to misfire

 

thats the rev limiter limiting revs

 

Thank you sir!

 

The limiter cuts ignition at an rpm threshold like 4000 when it does so it will kill ignition for a very short time, causing a mis-fire and keeping the engine from revving high without a load on it to extend engine life and get your attention. Some people think it sounds kind of cool but again nothing wrong with your truck.

 

Thanks again!

 

Wouldn't a rev limiter cut in at a higher rpm? Usually at redline?

 

So, to provide an update on this. It was in fact the rev limiter. I went to the dealer today to have tires rotated and while waiting I asked to test drive a similar truck. It did the same thing. Also, I have been thinking my truck was shuttering between 30-40 but that too was debunked at the new truck (same engine, model, trim) felt the same way. I am a new truck owner, never owned one, so I guess this is just how truck drive. You feel everything on the road (even on newly paved roads, which is rare in Massachusetts).

 

Probably not the smartest thing but I was thinking instead of punching it on the highway to reduce carbon on the intake valves I would rev it in park. Again, probably not the smartest move.

 

Soft limiter and it's normal.
https://m.youtube.com/watch?v=5Mr2rnQ0R2M

 

I believe what you are thinking of is the old "run it up to redline in the first 3 gears" mentality which is great for finding any hesitation or misfire. "Blowing the carbon out" every now and then and holding higher than normal rpm driving in a lower gear and doing pulls...no real need for any of that a modern engine runs 10x cleaner with the air fuel ratio constantly optimized. Legend had it if you bought an older persons car that babied it you would have to drive it like you stole it for awhile as it would be carboned up from all low speed driving.

 

It’s called an Italian tune up.

 

Totally normal. Just stop revving the piss out of it while stationary.

 

it’s direct and port injection don’t worry about that