Engine Flutter

Anyone else ever experience engine flutter on acceleration and low RMP? It’s been ongoing in my 2019 Tacoma SR5. I’ve taken it to Toyota dealership a few times and they have neverfixed it or even experienced it on test drive. It feels fuel related, maybe pump or injector. It improves when running on premium fuel.

 

Yeah. I get a slight miss on low RPM, light throttle applications. I have for 70k miles and 6 years. 93 fixes it unfortunately. I have also gotten no help from the dealer. I have found that alternating tanks of 87 and 93 get me to where my truck runs good.

There are many threads here about this, but you will still get bombarded by comments about premium being a waste, truck is tuned for 87, blah blah blah. Fact is some of these trucks run like crap on 87 or the equivalent for your altitude. Truck is designed to run on 87 and most do so fine, but my truck was also engineered to not have a whiny rear diff, or leaking 3rd brake light, or rusting door sills and I got those too. They can't all be winners I guess.

Between this fuel issue, torque converter shudder, and general truck vibes, this is a hard one to isolate. Lots of these things cause similar feeling while driving.

 

That exactly ^

My 2016 is similar. Built 10/2015 and it’s done it for 100,000 miles. Persisted through every ECU TSB and tune. Been through easily 10+ tunes to where I’m at and it’s always done it. I have a slight incline going from a 55 to 70 zone every day and accelerating from 55/60 to 70/75 in 4th is a stuttery experience. If I drop it to 3rd instead it’s smooth as it’s higher RPM. But in 4th under load - bumpy feeling each time.

I did run a 91 specific tune most of 2020 when gas was super cheap and I did notice an improvement. But with where prices are right now its 87 and deal with it. Doesn’t seem to break anything. Just annoying.