Idle Fluctuation due to aftermarket intake?

[mikeukrainetz]

Mine does that as well, idles around 800-1000 then drops and shudders slightly. I cant imagine that is a built in feature for anything... I had the same problem with my previous car.
Funny thing is the Yaris developed this idle fluctuation about 10000km not right off the lot. Does the yaris use the throttle body for idle air control or is it a seperate valve as on other makes/models?

[eTiMaGo]

Originally Posted by mikeukrainetz

Mine does that as well, idles around 800-1000 then drops and shudders slightly. I cant imagine that is a built in feature for anything... I had the same problem with my previous car.
Funny thing is the Yaris developed this idle fluctuation about 10000km not right off the lot. Does the yaris use the throttle body for idle air control or is it a seperate valve as on other makes/models?

As far as I remember from the technical manuals the idle is controlled by the electronic throttle.

[H2XcapePod]

yup...I noticed the same looping a while back and thought it was kinda sweet! Usually you only get that on tuned cars...the aspirations of a bone stock Yaris...

[muncher]

its the recirc valve ... uses exhaust air to heat up the air going to the intake

[El Jefe]

Originally Posted by muncher

its the recirc valve ... uses exhaust air to heat up the air going to the intake

ok lemme straighten some things out in the thread, i see alot of mis-informantion here

ok first off the yaris doesnt have a recirc valve, that is a part from the dark days of emissions control.

the problem the original poster is having is the a/c compressor kicking on and off, it seems like the computer is over/under compensating for the load change. i've noticed this on mine

the only way to fix this will be a reflash of the ecu to smooth the change out. toyota has no released this as yet and i highly doubt they will. it may be annoying but it causes no ill effect to the car as long as it's not stalling out or anything like that.

[Galavoxx]

Originally Posted by El Jefe

the problem the original poster is having is the a/c compressor kicking on and off, it seems like the computer is over/under compensating for the load change. i've noticed this on mine

the only way to fix this will be a reflash of the ecu to smooth the change out. toyota has no released this as yet and i highly doubt they will. it may be annoying but it causes no ill effect to the car as long as it's not stalling out or anything like that.

But I live in San Francisco, I've never even used the a/c. I'm just satisfied knowing that this is a problem with more than just my car. I do agree with you though, I doubt Toyota will ever do a recall to fix the problem.

[El Jefe]

Originally Posted by Galavoxx

But I live in San Francisco, I've never even used the a/c. I'm just satisfied knowing that this is a problem with more than just my car. I do agree with you though, I doubt Toyota will ever do a recall to fix the problem.

how often do you have your car in either of the defrost settings? that also turns the a/c compressor on even tho the little light does not come on.
try it out and let me know, test it with the a/c on or in defrost mode, and then with everything totally off.