Stumbling idle when stopping. - Toyota Yaris Forums

2bz · 02-10-2019, 09:25 AM

OP: Have you:

1. Cleaned the idle air control valve (under the TB)?
2. Cleaned the VVT oil control valve?
3. Replaced the oil control valve filter?

Phatdonkey78 · 02-10-2019, 12:16 PM

Quote:

Originally Posted by 2bz

OP: Have you:

1. Cleaned the idle air control valve (under the TB)?
2. Cleaned the VVT oil control valve?
3. Replaced the oil control valve filter?

I haven't done any of that yet. I'm planning on taking the TB off today and rooting around in there. I assumed there was no IAC due to it being throttle by wire.

I do have another question. If the TB is removed from the vehicle, can the butterfly be moved slowly to clean the back side of it and the edge? I have seen videos and forum posts saying it's ok to do so, while others say to never manipulate the butterfly EVER. I won't be flipping it rapidly, just slowly open it to clean it thoroughly, while trying to not strip the gears inside.

2bz · 02-10-2019, 12:28 PM

Quote:

Originally Posted by Phatdonkey78

I haven't done any of that yet. I'm planning on taking the TB off today and rooting around in there. I assumed there was no IAC due to it being throttle by wire.

I do have another question. If the TB is removed from the vehicle, can the butterfly be moved slowly to clean the back side of it and the edge? I have seen videos and forum posts saying it's ok to do so, while others say to never manipulate the butterfly EVER. I won't be flipping it rapidly, just slowly open it to clean it thoroughly, while trying to not strip the gears inside.

No IAC on this model. Sorry, my bad.

Phatdonkey78 · 02-16-2019, 09:03 PM

Today I got the throttle body gasket and got to work. Removed the TB and cleaned it front and back. Installed new gasket and slapped it all back together. It is a lot more responsive and the stumbling idle when braking is gone now.

Next task is passenger lower control arm replacement. Went to get an alignment and the ball joint is mangled pretty good.

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02-10-2019, 09:25 AM	#1
2bz Drives: 2008 Yaris 3DR Hatch MT Join Date: Dec 2018 Location: Harrisburg, PA Posts: 80	OP: Have you: 1. Cleaned the idle air control valve (under the TB)? 2. Cleaned the VVT oil control valve? 3. Replaced the oil control valve filter?

02-16-2019, 09:03 PM	#4
Phatdonkey78 Drives: 2007 Hatch Join Date: Feb 2019 Location: Norristown, PA Posts: 14	Today I got the throttle body gasket and got to work. Removed the TB and cleaned it front and back. Installed new gasket and slapped it all back together. It is a lot more responsive and the stumbling idle when braking is gone now. Next task is passenger lower control arm replacement. Went to get an alignment and the ball joint is mangled pretty good.