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post #1 of 9 (permalink) Old 07-13-2013, 07:55 PM Thread Starter
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OK, I really don't know where to post this. When my car is turned off and I'm just sitting there, I hear what sounds like knocking coming from the trunk. I sound like a crazy person, but my girlfriend and brother both heard it. Lol I looked in mY trunk, no one is in there by the way. I have a tool box and other stuff, but nothing is loose to randomly make the noise. It knocks like 4-5 times usually. Any ideas of what is doing this?

2005 cobalt base model coupe
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post #2 of 9 (permalink) Old 07-13-2013, 07:56 PM
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Casper, the friendly ghost!


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post #3 of 9 (permalink) Old 07-13-2013, 08:00 PM
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That is your Evap solenoid cycling, if you don't hear this you will probably have problems filling your tank with gas. Depending on how pressurized your tank is, when you stop your engine, and the outside barometric pressure, it can take between 4 and 6 actuations to equalize the tank pressure.

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post #4 of 9 (permalink) Old 07-13-2013, 08:38 PM Thread Starter
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Ok, thank you Coby! I thought it was Casper!

2005 cobalt base model coupe
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post #5 of 9 (permalink) Old 07-13-2013, 09:41 PM
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maybe next time..


2010 Cobalt 2LT Sports Package
2.5% tint all the way round.
SUPRRAAACHARRRGGEDDD
2.9 pulley, 60# Injectors, Injen 2.5" intake
55 Watt 6000K Hi/Lo HID's
35 Watt 5000K Fogs
Black SS 17" Wheels
Debadged
Spyder 3" Carbon Fiber Antenna
YAKIMA ROOF RACK WITH 40" LIGHTBAR
2.5' ZZP DP
Full set of Black Recaros
Eibach sportlines for teh low.
Front and rear SS lips
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post #6 of 9 (permalink) Old 07-13-2013, 09:50 PM
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Casper usually hides under the hood.....

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

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post #7 of 9 (permalink) Old 07-13-2013, 10:13 PM
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i thought i've saw him once coming out of the exhaust..


2010 Cobalt 2LT Sports Package
2.5% tint all the way round.
SUPRRAAACHARRRGGEDDD
2.9 pulley, 60# Injectors, Injen 2.5" intake
55 Watt 6000K Hi/Lo HID's
35 Watt 5000K Fogs
Black SS 17" Wheels
Debadged
Spyder 3" Carbon Fiber Antenna
YAKIMA ROOF RACK WITH 40" LIGHTBAR
2.5' ZZP DP
Full set of Black Recaros
Eibach sportlines for teh low.
Front and rear SS lips
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post #8 of 9 (permalink) Old 07-14-2013, 12:03 AM
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After seafoaming the engine?


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post #9 of 9 (permalink) Old 07-14-2013, 08:23 AM
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I hear that knocking also, I take it as she is telling me have a great day! (Smile)


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