Icv?

[aaron_silva]

I have had a surging idle for quite some time now. Every time I come up to a stop sign or sit in traffic, it goes from 500 to 950 rpms at a constant rate. Today when I got home from driving I popped the hood and unplugged the ICV and the idle was a bit high but didnt surge anymore. Is this a good sign that it is time for it to be replaced? I tried testing it but it is in the most inconvienent place (sandwiched between the intake mani and the firewall) and I dont know if I was getting accurate readings.

I would like to know that is what is causing this idle problem before I go pick up a new one.

I did recently replace: intake manifold gasket, most all vaccum lines, FPR, Fuel Pump and the TPS has the correct resistance for idle and WOT.

Thanks in advance.

Aaron

[nando]

try spraying the valve with some brake cleaner and see if that helps.

[AdamF 88iS]

try spraying the valve with some brake cleaner and see if that helps.

Ditto. Give it a good cleaning.

[aaron_silva]

I will try that again. I have sprayed it a few times in the past and it doesnt seem to do much. If that still doesnt solve the issue, is it a good possibility it is the ICV. It doesnt cost "that" much, so I might just pick one up.

Thanks

Aaron

[AdamF 88iS]

I will try that again. I have sprayed it a few times in the past and it doesnt seem to do much. If that still doesnt solve the issue, is it a good possibility it is the ICV. It doesnt cost "that" much, so I might just pick one up.

Thanks

Aaron

318s have a lot of vacuum leak potential too. I'd check that as well.

[aaron_silva]

While I had the ICV out of the car I tested the resistance across the terminals and got a reading of 8.2 ohms. Does that mean anything to anybody?

Also, does the little valve inside th ICV turn freely? I stuck a small pick and put a little pressure on it and it did not budge.

Thanks

Aaron

[aaron_silva]

That piece inside doesnt move. Is it supposed be like that.

Aaron

[A_325i]

ummm i beleive its supposed to move?..everytime ive cleaned mine ive been able to move it freely?

[aaron_silva]

Update for future reference:

After spraying the ICV, the idle seems to be a bit more normal. I still have a temporary drop in idle speed when the car comes to a stop, but it immediately returns to normal.

Thanks

Aaron