Normal ICV Buzzing?

[CirrusSR22]

Curious what you guys think of the buzzing sound from my idle control valve. I know the buzzing is what it's supposed to do, just want to know if yours sound like this (especially guys with newer ICVs).

I held the camera up close to get better sound, so it's a bit louder than it is in real life. Sounds a bit "rattly" to me. I'm thinking it was a smoother, more consitent buzz years ago. Thanks!

http://www.youtube.com/watch?v=gbaWjy8_k3M

[xxxJohnBoyxxx]

sounds good to me...

[juan.manjarres]

+1

[zoner]

It sounds a little louder than normal (may be due to microphone positioning), but that is definitely the sound it makes. If that's an original part, with that kind of mileage, it could be on its way out...

I picked a replacement Bosch unit up a few months ago from Auto Parts Warehouse- with coupon, I only paid about $165 shipped for it (cheapest one I found on the interwebs).

[ryszardsh]

+1, pretty much what mine has sounded like for 135K miles.

RAS

[CirrusSR22]

So every few weeks I've been having an issue where when I'm coming to a stop and I push in the clutch pedal I get a "bouncy" idle. It will bounce between about 500 - 1,000 RPM for a few seconds then settle down and idle normally. About three times now spread out over the entire summer the car has actually died as soon as I came to a stop because the idle dropped so low. It takes a little cranking to get it going again, then all is normal again for weeks-on-end.

Since this is a random occurance I'm doubtful it's a vacuum leak, plus all my vacuum lines/intake gaskets are newer. I've been suspicious of the idle control valve for a while so I just decided to bite-the-bullet and buy a new Bosch unit. Here's some back-to-back videos of the old vs. the new. You can hear that the old one is louder, inconsistent and rattly. The new one is smooth and quiet. I'll report back if this fixed my issue.

Old ICV. 220,233 miles
http://youtu.be/H_rW799t3Vs

New Bosch ICV.
http://youtu.be/HdGjufsZ18E

[Mr.Squeelerz]

Originally Posted by CirrusSR22

So every few weeks I've been having an issue where when I'm coming to a stop and I push in the clutch pedal I get a "bouncy" idle. It will bounce between about 500 - 1,000 RPM for a few seconds then settle down and idle normally. About three times now spread out over the entire summer the car has actually died as soon as I came to a stop because the idle dropped so low. It takes a little cranking to get it going again, then all is normal again for weeks-on-end.

Since this is a random occurance I'm doubtful it's a vacuum leak, plus all my vacuum lines/intake gaskets are newer. I've been suspicious of the idle control valve for a while so I just decided to bite-the-bullet and buy a new Bosch unit. Here's some back-to-back videos of the old vs. the new. You can hear that the old one is louder, inconsistent and rattly. The new one is smooth and quiet. I'll report back if this fixed my issue.

Old ICV. 220,233 miles
http://youtu.be/H_rW799t3Vs

New Bosch ICV.
http://youtu.be/HdGjufsZ18E

Fixed.

Big difference. I'm compelled to inspect mine when I get a chance.

[xxxJohnBoyxxx]

I've got a bounce idle at times and it is the CCV valve that is blown due to boost. I'm going to solve this with some high end one-way valves so it can CCV the crank case and pop open to purge ring blow by under high boost. My ICV is all tied together and JB welded since the boost blows the valve apart. If I plug the CCV I get a perfect idle but then get oil leaks since the vacuum caused by the CCV valve stops oil from getting by seals and helps to control oil leaks.

[CirrusSR22]

Originally Posted by Mr.Squeelerz

Fixed.

Big difference. I'm compelled to inspect mine when I get a chance.

Ooops... Thanks.

[CirrusSR22]

Well a week+ later and I have not seen a hint of "the bounce". Will update later.

[xxxJohnBoyxxx]

Great to hear and thanks for posting back your results. This thread you started will help others.

Best, John S

[spidertri]

Still going good Cirrus? I started getting the idle bounce yesterday.