thank you. i found your thread a few months ago and have been trying to find it again for weeks. finally got it and its getting bookmarked. I hope to pull mine apart shortly. this may have been posted in 2016 and your thread in 2012! still helping people in 2023!! awesome thanks man
Thanks! Once you get it off, just hold it up to a light and look down the throat, and see where the plate is sitting. If it's not perfectly in the middle, then you can adjust the thickness of the washer to make up the difference. I hope it fixes your issue!
I've been working on a Tacoma V6 with this issue and I tried the washer fix but in my case, because the vehicle has 300K miles, the edges around the butterfly valve were so worn that no matter how you shifted the linkage and pushed the valve closed, you could see light coming through on all sides. The vehicle had a history of P0171 code and despite hunting for vacuum leaks, didn't have much luck in finding any additional ones except the one at the throttle body. I ended up sending it to maxbore.com to have him rebore it and put a new butterfly valve. It helped tremendously but it didn't resolve the issue entirely. In some circumstances, like when the engine is hot and the intake air temperature is low (moving at speed, no stagnant air), it will idle fast. It probably idles fast because the throttle body is hot (engine) but the plate is cooler due to low intake air temperature so the valve is cooled a bit, shrinking it slightly. Slapping the throttle sometimes helps but at this point, I find my self still fiddling with the stop screws.
thank you. i found your thread a few months ago and have been trying to find it again for weeks. finally got it and its getting bookmarked. I hope to pull mine apart shortly. this may have been posted in 2016 and your thread in 2012! still helping people in 2023!! awesome thanks man
Thanks! Once you get it off, just hold it up to a light and look down the throat, and see where the plate is sitting. If it's not perfectly in the middle, then you can adjust the thickness of the washer to make up the difference. I hope it fixes your issue!
I've been working on a Tacoma V6 with this issue and I tried the washer fix but in my case, because the vehicle has 300K miles, the edges around the butterfly valve were so worn that no matter how you shifted the linkage and pushed the valve closed, you could see light coming through on all sides. The vehicle had a history of P0171 code and despite hunting for vacuum leaks, didn't have much luck in finding any additional ones except the one at the throttle body. I ended up sending it to maxbore.com to have him rebore it and put a new butterfly valve. It helped tremendously but it didn't resolve the issue entirely. In some circumstances, like when the engine is hot and the intake air temperature is low (moving at speed, no stagnant air), it will idle fast. It probably idles fast because the throttle body is hot (engine) but the plate is cooler due to low intake air temperature so the valve is cooled a bit, shrinking it slightly. Slapping the throttle sometimes helps but at this point, I find my self still fiddling with the stop screws.
What kind of metal was the replacement valve? I assume it should be the same. What did he say when you told him about this?
How do you clean it shown us how do you fix this problem