RPM.... shoot up to 1500 on idle

[Grail05]

Hi i am curious if anyone had this happen to your car... Yesterday driving normally in Los Angeles Traffic my RPM shoot up all of a sudden to 1.5rpm on idle... usually its below 1k when fully stop. This happened several time in within the an hour.

no error, cel, engine light or anything, it just shoot right up on idle after sometime of traffic.

does anyonw know if this is normal? this never happened to me before and this is my route for the last 2 years

EDIT: just wanted to add, my idle does not go below normal it just shoots up to 1500, and every morning it idles fine and runs fine...
Also i dont get this on COLD start as some might have mentioned. i will try to replicate what i did yesterday from work to home... Meaning drive in Los Angeles Traffic.

IF YOU HAD HAVE THIS PROBLEM POST YOUR EXPERIENCE, I have read all the thread regarding ICV but hoping someone can post on a problem that was fix by the dealer. thanks.

[M3DCTBT]

bad IAC, normal M3 problem

[Grail05]

Originally Posted by M3DCTBT

bad IAC, normal M3 problem

sorry to ask but what is that...

[JCtx]

Since you didn't put what model year in your sig, I assume you have an old one (you shouldn't be embarrassed to state the year man... and your location too ). And yes, I have an old one, and proud of it .

Not the typical sympton of a bad idle control valve (ICV not 'IAC'), but that's my guess. A bad ICV is a very common problem on '08 or '09s, but has also happened to newer ones. Did that coincide with hitting the A/C button or something else? At any rate, you'll have to wait until your DME throws a code before any dealer would do anything, so don't waste your time. You could check with a reader if there's a non-CEL-triggering code, but I doubt it. The good news is once it throws a CEL (aka the christmas tree), they clear a few times with an ignition cycle. Good luck.

[Grail05]

thanks... this makes me worry for some reason... im a bit paranoid... is it safe to drive it though once it gives me the christmas light? Also if you happen to know what are they replacing. i hear so many stories about engine damage cause of this? not sure i might have mixed up something differently but i guess im just being paranoid.

[Grail05]

bump

[kitw]

Why didn't you go read the threads about this issue, rather than expecting someone to package it up neatly for you?

The idle control valve failure is not going to strand you, so wait for the code. It's fine. Your car just won't idle right.

[LateBraking]

Originally Posted by kitw

Why didn't you go read the threads about this issue, rather than expecting someone to package it up neatly for you?

The idle control valve failure is not going to strand you, so wait for the code. It's fine. Your car just won't idle right.

Yeah, there's a lot of information on the infamous idle control valve just on this site alone.

http://www.google.com/#sclient=psy&h...w=1280&bih=822

[Grail05]

Originally Posted by kitw

Why didn't you go read the threads about this issue, rather than expecting someone to package it up neatly for you?

The idle control valve failure is not going to strand you, so wait for the code. It's fine. Your car just won't idle right.

DANG your upfront arent u ... thank bro. to be honest... just paranoid i guess.. its one of those things you know you get paranoid and you just want more answer even though its right in front of you.. LOL

Originally Posted by LateBraking

Yeah, there's a lot of information on the infamous idle control valve just on this site alone.

http://www.google.com/#sclient=psy&h...w=1280&bih=822

Thanks Bro, i know i know like said above post just paranoya.. LOL