3fe surge/ sputter

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Joined
Nov 5, 2025
Threads
2
Messages
9
Location
boise idaho
Hey guyssss, I’ve been looking for a thread for the last few months that’s close to the symptoms I’m having but I can’t find one. So! I’m making one.
Out of the 4 vehicles I have right now, my Toyota is the least reliable haha. It also get the most attention.
The problem is (as best as I can describe it) a sputter and surge before cutting out completely.
It’s completely random. It can happen on acceleration, while at consistent speed, or dead stopped at a light.
Most of the time it will just restart. Other times it won’t restart right away. Some times it will happen 10-15 times while driving other times, it will happen once an be fine the rest of the day.
The thing I have noticed is that it has started happening more. Multiple times in a drive (again, some drives it happens a lot and some less). Now, she starts in the morning with no problems at all and will warm up and idol fine. It’s when you start driving.
THINGS IVE DONE
I’ve checked fuel pressure at idol and woth some rpm and it’s within spec. I can’t see while I’m driving and I haven’t been able to recreate the problem in the driveway.
I’ve checked the fuel relay and the efi relays and replaced both with known good relays.
I pulled the entire intake system off including the TB and checked for a leak. Nothing was found. The TB got a good clean and a new gasket.
The AFM looks like it might have been tampered with at one point due to some silicone on the black cap on top although I’ve seen this on many older yotas.
I did clean the AFM gently and made sure it’s free moving without taking it apart.
So at this point it could be lots of things still. No codes have been thrown. Anyone have things to check? Does this sound familiar to anyone?
Let me know!
Thanks!! I
Nick80
 
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