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What is this... And why is it making noise?

SSMotorhead
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SSMotorhead Member

SSMotorhead

Posted
Posted

ad504ecf-8041-26b5.jpg

ad504ecf-8052-0c2f.jpg

I guess the best question. Is it serious, and is it expensive?

It's making a sort of metallic popping sound from the passenger floor board, right below the windshield. And has gotten progressively more frequent recently.

Also seems the noise is connected to the brake pedal somehow, lightly tapping the brake pedal makes it happen but sometimes when driving... If I release the brake pedal to pull out, it pops like 3 times.

I have no idea what that thing is, or how it works. And I'll probably either laugh hysterically at my own idiocy because it's real simple. Or cry because it's expensive and means something serious is going on.

Thank you in advance.

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SSMotorhead Member

SSMotorhead

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That is the cruise control servo. Get on from your local breakers yard.

Ok. So is it a "well this is bad, so that means this is probably either bad, or going bad" kinda thing?

Easy fix? Found one for 30 bucks on eBay. I've never heard the term "breakers yard" so I'm assuming this is a junkyard? In which case... I'm in west virginia, that ain't happening. These aren't in junkyards.

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wvicary Member

wvicary

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I don't know why it would be making noise and shouldn't be doing anything unless the cruise control is activated. Are you sure the noise is coming from this unit? Try disconnecting the electrical plug to isolate the fault.

Breakers yard is a junk yard.

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Nehmaiz Member

Nehmaiz

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from the picture i can see that the Servo is located next to the shock mounting. in my opinion that's where the noise might be coming from (or something in the suspension system)... try to see if it has any leeway/moves a bit when pushed by a screw driver...

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SSMotorhead Member

SSMotorhead

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To the best of my knowledge it has nothing to do with speed, or roughness of the road.

After one of the members above told me it's name. I googled it a few times and found a few pages and forum posts on it. One site said to unplug it and see if it stops clunking.

It was recently at a Porsche dealership getting a service, I told them that I had a "German" ECU in it and that because of this the Cruise Control didn't work. Previous owner said he had this ECU installed because the car had no Catalytic Converters. I go "Ok, sounds believable." So the dealer says, we replaced the Computer with an American one. Cruise still didn't work and that's when the noise started. A website said a bad computer can cause this... So I'm about to have a talk with a service manager. I was in Afghanistan at the time and the more I think about this dealership experience I can't help but feel like they cheated my mother (who took the car there while I was down range) just because ... Hey, it's easy to tell a woman anything about cars. :P

Edited by SSMotorhead
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SSMotorhead Member

SSMotorhead

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What ECU are you referring to? The DME for fuel injection/Ignition has nothing to do with the cruise control as it is control by a seperate control module.

Interesting note I'll be asking the service manager soon.

I'll be honest I don't know much about this car. I assumed being an engine related function it'd be controlled by the PCM. But the cruise has a separate module?

Guess it's possible the computer they replaced wasn't my "no-cat PCM" but the one in question?

Hmmm. Something isn't adding up here.

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