car idle drops up to down when in park

[droptop_325i]

recently when i get in to my car it idles up and down not hard just slightly i was thinking it was the vacumm lines but im not real knoledged about bmws yet so if yall have any suggestions just reply thanks.

[droptop_325i]

damm guess noone wants to give me any advice well that sucks...:x

[pe2one]

check your icv,

[droptop_325i]

whats the icv and how do i check it i thought it would be the vacumm lines.

[jlevie]

An intake leak usually results in a rough idle, but a sticking ICV results in an unstable idle. On a car of this age the odds are that both problems are present.

[droptop_325i]

how much do you think it will be to fix this problem if you might know ???

[fretburnr]

it could be as simple as a $2 can of carb+choke cleaner to clean out your ICV, or as expensive as replacing the intake manifold gasket.

start cheap.

[droptop_325i]

yeah i read up on the icv ima get the carb cleaner ans see if that will work hopefully it will. do yall think a bad vacuum line might be the problem.

[adevera86]

i just changed my icv, tried cleaning it, still same result. so i just changed it, it was about $250 for parts. now it works like new

[bimmerboy12]

Ouch.

i just changed my icv, tried cleaning it, still same result. so i just changed it, it was about $250 for parts. now it works like new

[spoolin318i]

i just changed my icv, tried cleaning it, still same result. so i just changed it, it was about $250 for parts. now it works like new

Just for further reference, the unit could be had alot cheaper used or you can even try autozone or some other similair auto store. I think autozone had a new one for $125 or something. Still, you could just get a circuit tester and check a used one.

[FlyingPrick]

First check well for air intake leaks. when unmetered air gets in there it causes all kinds of hell. turn your switch on but don't crank. get out and open the hood and if the ICV hums and vibrates, it's probably OK.

I vote check your TPS. it sits there under the throttle body and gets all kind of oil and crap inside it. I took mine apart, sprayed some carb cleaner in it, got all that crap out of it and put it back together and adjusted it properly. Works great. If you haven't already, get the Bentley. It covers all facets of idle control and where/ how to go about diagnosing the exact problem so you don't take the "shotgun" approach and spend more money than you had to.

[eyagel]

clean your carb.

[ethree]

Does it only happen when you're in park?

[droptop_325i]

yo

it happens when im in park and also when im at a redlight waiting holdn the brake . but other than that my car runs great .