'99 2WD 3.4 4Runner with crazy idle issue - bad MAF sensor???

[Bad Luck]

2000 t4r 3.4 rough idle, losing power, no vacuum leak, gas mileage is quickly dropping. I don't know how to post pictures of data. This is what it read
Calc Load

ECT

STFT B1 LTFT B1

Eng RPM



22.7 %

189 (°F

-08 %

258 %

713
Stft was -0.8
Ltft was -25.8
WTH is wrong?

Likely a stuck open injector, but try pulling the vacuum line off the fuel pressure regulator to see if there's any fuel in the vacuum line or coming from the vacuum line fitting on the fuel pressure regulator. Your engine is trying to reduce fuel so it's not a vacuum leak or unmetered air. How does your exhaust smell?