ZZE122R IDLE UNSTABLE

[GTS-R]

Hi There,

This is my first post.

I have a 2002 corolla sedan 5 speed manual.

I have an unstable idle intermittant but does occur every day.

Stopped at a set of lights the idle fluctuates from 600 -800 rpm.

The engine also feels a bit rough and I can feel a lot of vibration through the steering wheel.

This is also noticed driving at low speeds.10-40kmh

I cant seem to trace if this is an electrical problem or something else. Eg: SENSOR OR AIR INTAKE FLOW METER ETC

It does not occur all the time but every day I drive it I will notice it and sometimes when it starts will stay like

that until I stop.

Any ideas on what could be causing this on the 1.8 litre 1ZZ-FE engine.

Any tests I can do to try and narrow it down.

Would it be something that would show up as a fault code.

Any info appreciated.

Regards

JC

[Kenshin X]

hi mate and welcome to the forums! have you tried to clean the idle speed controller? mine would sometimes idle between 600-800 rpm and is really rough. after i cleaned it, it was much better and even idles between 800 to 900 rpm.

becareful of the screws that hold the IACV, they are a bitch to get off, read this guide and u'll know what i mean

[123R-Prozak]

You need a punch

[GTS-R]

Thanks Guys,

Maybe worth a shot.

I have access to a screw punch which may help for those nasty screws.

If any other possibilities come to mind please let me know.

In the meantime I may try this when I get a chance.

JC