"Pop" Sound on shutdown?
09-20-2014, 12:21 PM
#32
Rennlist Member
- How long have you owned it
- Year
- stock or aftermarket stereo and speakers
- stereo configuration Bose, etc
- any recent work done in the cockpit, added any new anything that needs 12 volts
- any recent work done anywhere on the car electric related including engine work.
So if it's a "pop" that is coming through a speaker, try getting your ear close to one of the speakers and confirm that.
09-20-2014, 02:05 PM
#33
I'm no expert, but we (I mean all of us) should start with some baseline info:
- How long have you owned it
- Year
- stock or aftermarket stereo and speakers
- stereo configuration Bose, etc
- any recent work done in the cockpit, added any new anything that needs 12 volts
- any recent work done anywhere on the car electric related including engine work.
So if it's a "pop" that is coming through a speaker, try getting your ear close to one of the speakers and confirm that.
- How long have you owned it
- Year
- stock or aftermarket stereo and speakers
- stereo configuration Bose, etc
- any recent work done in the cockpit, added any new anything that needs 12 volts
- any recent work done anywhere on the car electric related including engine work.
So if it's a "pop" that is coming through a speaker, try getting your ear close to one of the speakers and confirm that.
Did find tookie manual in owners manual, does not appear to be installed though
09-20-2014, 04:35 PM
#35
Rennlist Member
The amplifier part of the stereo has capacitors. I suspect something is causing it to arc over after shutdown. It can be corrosion, heavy accumulation of dust or even a spider web (yep had one of those causing issues in my Volvo 240 ECU)
If you know the previous owner, it might be worth asking if there were any aftermarket electronics installed and since removed prior to the sale. I've seen too many times bad aftermarket wiring jobs made worse with a de-install. Usually it's the grounds that are forgotten about.
Have you opened the fuse panel and check the fuses and look for signs of aftermarket fuse multipliers?
Does the POP happen if the stereo/PCM is off at shutdown?
If you know the previous owner, it might be worth asking if there were any aftermarket electronics installed and since removed prior to the sale. I've seen too many times bad aftermarket wiring jobs made worse with a de-install. Usually it's the grounds that are forgotten about.
Have you opened the fuse panel and check the fuses and look for signs of aftermarket fuse multipliers?
Does the POP happen if the stereo/PCM is off at shutdown?
09-23-2014, 04:26 PM
#36
The amplifier part of the stereo has capacitors. I suspect something is causing it to arc over after shutdown. It can be corrosion, heavy accumulation of dust or even a spider web (yep had one of those causing issues in my Volvo 240 ECU)
If you know the previous owner, it might be worth asking if there were any aftermarket electronics installed and since removed prior to the sale. I've seen too many times bad aftermarket wiring jobs made worse with a de-install. Usually it's the grounds that are forgotten about.
Have you opened the fuse panel and check the fuses and look for signs of aftermarket fuse multipliers?
Does the POP happen if the stereo/PCM is off at shutdown?
If you know the previous owner, it might be worth asking if there were any aftermarket electronics installed and since removed prior to the sale. I've seen too many times bad aftermarket wiring jobs made worse with a de-install. Usually it's the grounds that are forgotten about.
Have you opened the fuse panel and check the fuses and look for signs of aftermarket fuse multipliers?
Does the POP happen if the stereo/PCM is off at shutdown?
It looks like there is an amp in the frunk where the oem toolkit and everything are...is that the standard location? If so I can check the connections there and see if there are any obvious issues.
I'm starting to think tookie was installed and uninstalled incorrectly, causing this. Good think I'm useless when it comes to electrical work
09-23-2014, 06:00 PM
#37
Rennlist Member
I'm pretty sure that Porsche did not install an amp in the frunk, but I don't know the 2007 models. Looks like you have some after market components. Can you take a picture of what's in the frunk? Please capture the make and any wiring connections on the component.
Turning the receiver off in cockpit may or may not affect the component in the frunk. It will depend on how the installer wired everything up.
Please, what the heck is "tookie"?
Turning the receiver off in cockpit may or may not affect the component in the frunk. It will depend on how the installer wired everything up.
Please, what the heck is "tookie"?
09-24-2014, 01:26 AM
#38
I'm pretty sure that Porsche did not install an amp in the frunk, but I don't know the 2007 models. Looks like you have some after market components. Can you take a picture of what's in the frunk? Please capture the make and any wiring connections on the component.
Turning the receiver off in cockpit may or may not affect the component in the frunk. It will depend on how the installer wired everything up.
Please, what the heck is "tookie"?
Turning the receiver off in cockpit may or may not affect the component in the frunk. It will depend on how the installer wired everything up.
Please, what the heck is "tookie"?
Attached is a photo of the frunk... It looks ampish and has a porsche sticker, and apparently some handwritten tag that says 08 porsche. Mine is an 07, oddly.
09-24-2014, 08:24 AM
#39
Rennlist Member
That certainly is a Porsche amp and appears to be installed in a factory location. I would search via Rennlist and Google the part number 997.645.331.01 part of the Sound System Plus ASK system. A few threads on those amps failing which it appears to have happened at least once with your 911 given the ducktaped sticker with "08".
The amplifier would be on my short list of things to investigate. If I could figure out the fuse that feeds the amp, I'd be inclined to pull that fuse and see what happens relative to a POP sound. here is a good read http://www.planet-9.com/987-cayman-b...kage-plus.html
The amplifier would be on my short list of things to investigate. If I could figure out the fuse that feeds the amp, I'd be inclined to pull that fuse and see what happens relative to a POP sound. here is a good read http://www.planet-9.com/987-cayman-b...kage-plus.html
09-24-2014, 04:20 PM
#41
That certainly is a Porsche amp and appears to be installed in a factory location. I would search via Rennlist and Google the part number 997.645.331.01 part of the Sound System Plus ASK system. A few threads on those amps failing which it appears to have happened at least once with your 911 given the ducktaped sticker with "08".
The amplifier would be on my short list of things to investigate. If I could figure out the fuse that feeds the amp, I'd be inclined to pull that fuse and see what happens relative to a POP sound. here is a good read http://www.planet-9.com/987-cayman-b...kage-plus.html
The amplifier would be on my short list of things to investigate. If I could figure out the fuse that feeds the amp, I'd be inclined to pull that fuse and see what happens relative to a POP sound. here is a good read http://www.planet-9.com/987-cayman-b...kage-plus.html
09-24-2014, 06:00 PM
#43
I have turned the key to "on" several times without starting the car, stereo comes on automatically. After shut down, the car does pop.
09-24-2014, 07:44 PM
#44
Rennlist Member
We'll make an electrical wizard out of you yet...
One more test. With the car off, remove the wiring harness from the amplifier. repeat the earlier key /stereo on but do not start. Then turn it off. Does it pop? If not, replacing the ASK amp is the direction I would head. However, something upstream from the amp could be discharging through the amp at shutdown, but based on ASK amplifiers' history, it's probably the amp.
Based on this link, I offer a few thoughts, http://www.6speedonline.com/forums/9...ement-diy.html
- ask around town about really good auto stereo installers who've been doing it a while.
- Print the article out, ask them what they would recommend. It's not a difficult job especially since the wiring has been sorted
You can also go this route. 5 year warranty and less expensive ($100 euro) than having someone install an aftermarket amp. Send the guy an email describing the issue and see what he says. http://www.bergvillfx.com/index.php/services.html . It keeps everything factory.
One more test. With the car off, remove the wiring harness from the amplifier. repeat the earlier key /stereo on but do not start. Then turn it off. Does it pop? If not, replacing the ASK amp is the direction I would head. However, something upstream from the amp could be discharging through the amp at shutdown, but based on ASK amplifiers' history, it's probably the amp.
Based on this link, I offer a few thoughts, http://www.6speedonline.com/forums/9...ement-diy.html
- ask around town about really good auto stereo installers who've been doing it a while.
- Print the article out, ask them what they would recommend. It's not a difficult job especially since the wiring has been sorted
You can also go this route. 5 year warranty and less expensive ($100 euro) than having someone install an aftermarket amp. Send the guy an email describing the issue and see what he says. http://www.bergvillfx.com/index.php/services.html . It keeps everything factory.
Last edited by CAVU; 09-24-2014 at 08:31 PM.
09-25-2014, 12:48 PM
#45
We'll make an electrical wizard out of you yet...
One more test. With the car off, remove the wiring harness from the amplifier. repeat the earlier key /stereo on but do not start. Then turn it off. Does it pop? If not, replacing the ASK amp is the direction I would head. However, something upstream from the amp could be discharging through the amp at shutdown, but based on ASK amplifiers' history, it's probably the amp.
Based on this link, I offer a few thoughts, http://www.6speedonline.com/forums/9...ement-diy.html
- ask around town about really good auto stereo installers who've been doing it a while.
- Print the article out, ask them what they would recommend. It's not a difficult job especially since the wiring has been sorted
You can also go this route. 5 year warranty and less expensive ($100 euro) than having someone install an aftermarket amp. Send the guy an email describing the issue and see what he says. http://www.bergvillfx.com/index.php/services.html . It keeps everything factory.
One more test. With the car off, remove the wiring harness from the amplifier. repeat the earlier key /stereo on but do not start. Then turn it off. Does it pop? If not, replacing the ASK amp is the direction I would head. However, something upstream from the amp could be discharging through the amp at shutdown, but based on ASK amplifiers' history, it's probably the amp.
Based on this link, I offer a few thoughts, http://www.6speedonline.com/forums/9...ement-diy.html
- ask around town about really good auto stereo installers who've been doing it a while.
- Print the article out, ask them what they would recommend. It's not a difficult job especially since the wiring has been sorted
You can also go this route. 5 year warranty and less expensive ($100 euro) than having someone install an aftermarket amp. Send the guy an email describing the issue and see what he says. http://www.bergvillfx.com/index.php/services.html . It keeps everything factory.
I appreciate all the help, everyone!