Hunting And Stalling

[bazz84]

hi all

ive had my 32 for 4 years without a problem, but recently it has been hunting and turning off

car starts first go in the morning,

Drives fine for a while. then suddenly starts hunting anf stalling

mostly on idle

also can feel the car sluggish when accelerating sometimes

Its standard car with 3" exhaust and pod filters

ive changed the spark plugs abd basic service

cleaned the AFMs

any advice is much appreicated

[MBS206]

Clean the IACV very thoroughly.

[bazz84]

will do on weekend

thanks for advice mate

cheers

[HR32GTS 4DOOR]

May have a blocked cat. Mine hunted at idle with a blocked cat. Also explains the lack of power.

[Dose Pipe Sutututu]

unplug the O2 sensor and start up the car, drive it around and once it warms up see if she still hunts.

[bazz84]

what will unplugging the o2 sensor do?

i thought the O2 sensor was only at idle an shouldnt affect how the car accelerated.

If the cat was blocked, wouldnt it hunt and have lack of power at all times, including when its cold?

[Dose Pipe Sutututu]

More so the idle hunt and stalling. 5 second test, just unplug it and see how the car behaves.

[bazz84]

Thanks for the advice,

i have cleaned the iacv (bitch of a job and didnt try to take off the sealant). Put it back in and now it runs on (only drove it for 20minutes) i noticed when i turn on the AC the revs drop :S

any ideas?

cheers

[Traah221]

Well, the IACV is meant to control your airflow at Idle, meaning if you turn on things that put load on your engine at idle (i.e. AC), it's going to change your idle speed to match. But for your issue, a good cleaning on the Idle Control Screw on your IACV will usually fix idle hunting. You probably noticed the tip of the screw had a fair bit of caked-on crud on the tip when you pulled the unit off, right?

[Dose Pipe Sutututu]

have you tried to unplug the O2 sensor and take it for a drive yet?

it's a 5 second job