trunk knocking(sp?)
10-06-2007, 02:22 AM
#1
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trunk knocking(sp?)
i cant figure out what it is.. sometimes it makes it others it doesn't.. its 3 taps every time.. is it something adjusting by itself or what any one know?
10-06-2007, 02:26 AM
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10-06-2007, 02:33 AM
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I could be wrong, but I always thought it was the trunk lock checking to make sure it's not ajar--mine does it a lot, especially after I turn off the car or park. 
10-06-2007, 02:58 AM
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There's a ghost in your trunk, say 4 million hail mary's, cover yourself with garlic and always keep a wooden stake and a silver bullet on hand in case the ghost has friends over of course
10-06-2007, 03:32 AM
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my car also does this, i am glad someone posted a thread about this. i didnt want to make one and have no one know what i am talking about, and probably make fun of me and call me a retard(not like that has happened before or anything) are you sure it is the fuel pump?
now i know
10-06-2007, 06:13 PM
#10
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yeah i get it too. after the last 2 cars i've had, when i heard this i always got a littler nervous. every little noise i hear i think its my car falling apart. lol. not used to driving something nice!
10-06-2007, 06:17 PM
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are you talking about the knocking noise it makes a little bit after you turn the car off? I think thats something to do with the battery/charging system...thats what i was told anyways
10-06-2007, 06:43 PM
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It's the evap system purge canister. There is a TSB out telling the dealers not to replace it as it's not malfunctioing.
Sounds like someone knocking 3 times on the trunk.
Sounds like someone knocking 3 times on the trunk.
10-07-2007, 07:10 PM
#17
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no no no, you guys got it all wrong. what the knocking really is is the fuel leaving the supercharger and going back into the fuel cell. once you shut the car off some fuel is still left in the supercharger.
10-08-2007, 10:12 AM
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Here's the TSB on the knocking noise. Some say it's the evil monkey in the trunk trying to get out HAHA.
Subject: Noise from Rear Of Vehicle - keywords canister cold CVS click evap knock L61 LE5 noise rear solenoid tick vent #PIC4317B - (01/23/2007)
Models: 2006-2007 Saturn ION
2006-2007 Chevrolet Cobalt
2007 Pontiac G5
2005-2007 Pontiac Pursuit
with Engine RPO L61 or LE5
This PI is being superseded to update technical information. Please discard PIC4317A.
-
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
A noise may be heard from the rear of vehicle; typically 3-5 knocks during initial cold start. The noise may sound like someone outside of the vehicle is tapping on the back window or on the rear exterior body panels.
Recommendation/Instructions:
This noise is from the vehicle's EVAP canister vent solenoid going through the diagnostic cleaning cycle, which is part of the software calibration set-up. Replacing the EVAP canister may not resolve the issue when the vehicle is re-exposed to a cold start. No parts should be replaced. This should be considered a normal condition for 2007 and previous model years.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
Document ID# 1890375
2006 Chevrolet Cobalt
2006 Chevrolet Cobalt
--------------------------------------------------------------------------------
Subject: Noise from Rear Of Vehicle - keywords canister cold CVS click evap knock L61 LE5 noise rear solenoid tick vent #PIC4317B - (01/23/2007)
Models: 2006-2007 Saturn ION
2006-2007 Chevrolet Cobalt
2007 Pontiac G5
2005-2007 Pontiac Pursuit
with Engine RPO L61 or LE5
--------------------------------------------------------------------------------
This PI is being superseded to update technical information. Please discard PIC4317A.
-
-------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
A noise may be heard from the rear of vehicle; typically 3-5 knocks during initial cold start. The noise may sound like someone outside of the vehicle is tapping on the back window or on the rear exterior body panels.
Recommendation/Instructions:
This noise is from the vehicle's EVAP canister vent solenoid going through the diagnostic cleaning cycle, which is part of the software calibration set-up. Replacing the EVAP canister may not resolve the issue when the vehicle is re-exposed to a cold start. No parts should be replaced. This should be considered a normal condition for 2007 and previous model years.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
10-12-2017, 07:29 AM
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Trunk knocking
DEFINITELY a ghost .....I let my mechanic (yes I own a Hyundai and have a mechanic 4 er...lol) have my car all weekend and he never heard a sound ....ive taken it to him several times because of this reason but never hears it and says its A ...ok ??? Im nutz so ill be driving ...when the knocking starts im like STOP ...I SAID YOU AINT GETTING OUT ...juat lay back down and stop annoying the hell out of me ...I get looks ....Do I care ??? At least my windows have always been up 1 of these days sum1s actually going to hear my ******* and im gonna get stopped .....Lol .....mabey theyll know wht it is ...oh wait they wont hear it 😬🔫😬🔫😬🔫
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