Idle Problem

[N13Astra]

R33 SII 96 Turbo Manual.

THe problem is that when the car is idling, it will start to rev down to 500-700rpm and recover, and then start over again and so on. It stops after a few secs but starts over again.

What could be the cause?

[paulr33]

have u tried a search? what mods? have u tried factory ecu reset?

[N13Astra]

I Have searched, couldnt find anything. Stock car apart from pod air filter. How do you do a factory reset?

[krzysiu]

does this happen when you have the heating or air con on?

[PLYNX]

Sounds like the idle control valve is gummed up and full of crap. Same thing happened to me

[N13Astra]

No Air Con or Heater.

PLYNX: I was thinking the same thing, but wanted to know of other problems which would cause same result.

[WhitePrincess]

Sounds like the idle control valve is gummed up and full of crap. Same thing happened to me

<{POST_SNAPBACK}>

where abouts is that idle valve? is it easy enough to clean it yourself? i have the same problem on my r33 s2...

[The Mafia]

do you have an aftermarket BOV?

[WhitePrincess]

no bov, no upgrades at all... completelly stock

[paulr33]

have u tried factory ecu reset?

no bov will make it surge on gearchange and reduce the life of the turbocharger

[WhitePrincess]

have u tried factory ecu reset?

no bov will make it surge on gearchange and reduce the life of the turbocharger

<{POST_SNAPBACK}>

not quite sure what factory ecu reset, but have disconnected the battery and pressed on brake pedal for 2 mins, people say that helps but didnt do much for me... it also comes and goes, sometimes it's ok, sometimes just stalls when slowing down to the traffic lights or when parking...

[Psymon]

dont they have a factory plumback..? the 32's definatly do !

[7yphon]

I think what he means is no bov upgrade.

[DFAULT]

Same problem as mine

i just replaced my AFM with another stock one

all good now

try borrowing a friends

[WhitePrincess]

hey guys, just thought let you know, i went down to get my car checked out by some professionals this morning... the guy connected the computer to my car and a few minutes later he told me that my car was running rich and my O2 sensor was stuffed. getting it done on wednesday morning - $250 the guy told me that the probability that this is the problem is very high, so i am hoping this will fix it... will keep you updated...

[N13Astra]

Thanks for the info guys. I've been searching around and seems to be the AFM. One other thing i should say is if i open the oil cap while the car is idling, the idle drops quite a bit and the car sounds like its going to stall? Vacuum problem maybe?

[charlieR34]

could be the o2 sensor?

[WhitePrincess]

hey all, i am happy to say that the problem has been fixed, my car is running very smooth now, very happy with it. the O2 sensor has been replaced for $250 - and it's definitely worth it. if you are in qld gold coast see tony from adrenalin imports 5591 2444

[paulr33]

the 02 sensor shouldn't affect idle, was there anything else changed? your car should idle fine even with the 02 sensor unplugged

[rb25]

Dirty throttle body?

-rb25