Strange anomaly at 1,000 - 1,500 RPM - Toyota Yaris Forums

YOUNG SCOOTER · 01-01-2026, 03:43 PM

Things to do to get piece of mind
-replace all 4 spark plugs. Not hard and not expensive
-put a can of sea foam in the gas tank
-get MAF sensor cleaner (not throttle body or carb cleaner) and take apart the intake tubing and deep clean the sensor and also spray some into the throttle tubing and the throttle opening.
-new air filter
change oil
then nice long 1 hour drive on the interstate

If still having problems you'd probably want to take it in to toyota to have the transmission fluid changed. Used to have a grand marquis that would slip out of torque converter lockup in 4th gear and sort of feel like a soft misfire. Had 100k miles on the trans fluid, changed it out and it never happened again.

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01-01-2026, 03:43 PM	#4
YOUNG SCOOTER Drives: 2008 Toyota Yaris Hatch Join Date: Feb 2021 Location: IL Posts: 23	Things to do to get piece of mind -replace all 4 spark plugs. Not hard and not expensive -put a can of sea foam in the gas tank -get MAF sensor cleaner (not throttle body or carb cleaner) and take apart the intake tubing and deep clean the sensor and also spray some into the throttle tubing and the throttle opening. -new air filter change oil then nice long 1 hour drive on the interstate If still having problems you'd probably want to take it in to toyota to have the transmission fluid changed. Used to have a grand marquis that would slip out of torque converter lockup in 4th gear and sort of feel like a soft misfire. Had 100k miles on the trans fluid, changed it out and it never happened again.