Knock Knock Knock!
12-31-2005, 01:42 PM
#26
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It is the computer checking to see if the trunk is locked. It cycles about 3 times (3 Knocking noises). And also when you turn the car off something in the engine bay ( something to do with the s/c), it almost sounds like dropping a marble into a plastic cup.
EDIT: Disregaurd the trunk thing LOL!
EDIT: Disregaurd the trunk thing LOL!
12-31-2005, 01:52 PM
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Originally Posted by Fingersmoran
Anyone here ever hear knocking coming from the back of there Cobalt ss/sc. I hear it sometimes even when the car has just been parked and the engine is shut off. It sounds like someone is knocking on the side of the car?? Very strange.
12-31-2005, 02:09 PM
#28
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dude laugh @ me all you want but my car did the same thing....CHECK YOUR RADIO ANTENNA .....mine constantly comes loose for one reason or another and wobbles, when it does that (even in the slightest wind or wiggle in the car) it will make a clunk or "Knock" noise...try it!
12-31-2005, 02:19 PM
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Originally Posted by TurboTechRacing
When you hear it try to keep a mental record of how much gas you have. If it is always somewhat around full area when it does it. Most likely it will be the gas moving. 
12-31-2005, 02:37 PM
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Originally Posted by Python467
dude laugh @ me all you want but my car did the same thing....CHECK YOUR RADIO ANTENNA .....mine constantly comes loose for one reason or another and wobbles, when it does that (even in the slightest wind or wiggle in the car) it will make a clunk or "Knock" noise...try it!
and im glad to know that the knock knock knock is not a ghost....b/c it scares teh **** outta me
12-31-2005, 02:42 PM
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OK, look! I'm at work and just brought my SS/SC in to the shop. I commanded the EVAP vent soliniod On and Off. Guess what? Same noise, it is the EVAP system, trust me.
12-31-2005, 04:41 PM
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Lol this is good.
I get a weird ticking noise in my car. Its from the headers/downpipe. Its just that type of metal cooling down. My parents new Yukon does the same thing when it cools down. Sounds more like water dripping on metal.
I get a weird ticking noise in my car. Its from the headers/downpipe. Its just that type of metal cooling down. My parents new Yukon does the same thing when it cools down. Sounds more like water dripping on metal.
12-31-2005, 05:31 PM
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Originally Posted by TurboTechRacing
When you hear it try to keep a mental record of how much gas you have. If it is always somewhat around full area when it does it. Most likely it will be the gas moving.
01-01-2006, 02:58 PM
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Originally Posted by powerbalt4020
HAHAHA yeah the first time it did it to me was at night too out in the country....freaked me out!
01-01-2006, 03:57 PM
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listen to NJBLUESS . I as well work for a gm dealership and it is true what he says. command the vent solenoid on and off with the scan tool and the same noise is heard. it's not a ghost, it's not the trunk latch, IT'S THE EVAP SYSTEM DOING A SELF TEST!!
03-11-2006, 09:46 PM
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Mine does this ALOT.....several times in a single drive sometimes, I can't see the EVAP system testing itself THIS often....Then again I'm no mechanic, but I do like the loose antenna idea....
03-11-2006, 10:19 PM
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Originally Posted by Python467
dude laugh @ me all you want but my car did the same thing....CHECK YOUR RADIO ANTENNA .....mine constantly comes loose for one reason or another and wobbles, when it does that (even in the slightest wind or wiggle in the car) it will make a clunk or "Knock" noise...try it!
My friend (EVO04) told me to check the antenna, and sure enough that's what it was alright. I was almost ready to take it back to the dealership.
The EVAP thing is a different noise altogether. I get it when I pull into my garage about 3 to 5 seconds after I shut her off. That sounds correct that the EVAP would cycle like that. It is weird sounding though.
03-11-2006, 10:20 PM
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when my mother got her new cougarC2, me and my dad drove to granny, it was dark, and it made like a low dog barking sound after we shut it down and we thought we hit granny's dog. lmao but it is the trunk latch....just thought i would share that with u
03-11-2006, 10:31 PM
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Originally Posted by Mines_Better
yeah it just happened to me about an hour ago while i was messing with my radio stations. it has happened plenty of times before that although i have no clue what it is... first time freaked me out cause it was at night.
Originally Posted by powerbalt4020
HAHAHA yeah the first time it did it to me was at night too out in the country....freaked me out!
Originally Posted by memphisr24
Yeah I remember looking once and my gas was about 3/4 to full when it happened. I'll look at the guage next time. Idk it just freaks me out, especially if it's like 2 in the morning and it's really quiet out. (as you can see, i'm afraid of the dark lol)
Just kidding.
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