Mysterious electronic noise in engine bay
Mysterious electronic noise in engine bay
Okay, I finally got this on video. My car makes this weird electronic noise in the engine bay about one or two days per year. On those days, it will do it several times. It sounds like it's coming from the passenger side and it always happens when the key is not in the ignition. It may happen when the car is running, but I would never be able to hear it over the exhaust, so I'm not really sure about that. Any ideas? Fast forward to 0:38 for the noise.
https://youtu.be/Fk0H0f1zpbA
https://youtu.be/Fk0H0f1zpbA
2011 9C3: 11.48 @118.
Re: Mysterious electronic noise in engine bay
Nobody has any clue what this can be?
2011 9C3: 11.48 @118.
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- Location: North Jersey
Re: Mysterious electronic noise in engine bay
WTF O.o
My wife's Mazda makes some noises like relays clicking right when I shut it down. But this is a new one and I'm genuinely interested.
-J
My wife's Mazda makes some noises like relays clicking right when I shut it down. But this is a new one and I'm genuinely interested.
-J
2012 Caprice
2008 CVPI
Both gone but not forgotten...
2008 CVPI
Both gone but not forgotten...
Re: Mysterious electronic noise in engine bay
Weird, right? If it did it more than a few times a year, I'm sure I could figure it out, but it's so random.
2011 9C3: 11.48 @118.
Re: Mysterious electronic noise in engine bay
Maybe some left behind piece of police equipment that's dying?
2011 Caprice PPV, former RCMP test vehicle, never put into service
Build Thread: http://www.newcaprice.com/forum/viewtopic.php?t=2419
Build Thread: http://www.newcaprice.com/forum/viewtopic.php?t=2419
Re: Mysterious electronic noise in engine bay
It was civilian owned its entire life. There was never one bit of police gear installed in it.
2011 9C3: 11.48 @118.
Re: Mysterious electronic noise in engine bay
Just guessing here... EVAP purge Solenoid?...
Maurice
Maurice
Maurice Sheil
mhsheil@gmail.com
2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1996 Chevrolet K2500 Extended Cab, long box, 454, 91,000 rust free miles
1974 SJ Grand Prix 455 well optioned with factory moon roof
mhsheil@gmail.com
2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1996 Chevrolet K2500 Extended Cab, long box, 454, 91,000 rust free miles
1974 SJ Grand Prix 455 well optioned with factory moon roof
Re: Mysterious electronic noise in engine bay
Fuel tank pressure vapor system??
If that s it then it s normal. Sometimes I ll hear one of my cars doing that in the quiet garage. Like you said, one or twice a year that I ll catch it. I m sure it does it more often. One of those EPA things to stop fuel vapors from escaping into the atmosphere . Usually it come from closer to the tank but who knows how the sound it traveling.
If that s it then it s normal. Sometimes I ll hear one of my cars doing that in the quiet garage. Like you said, one or twice a year that I ll catch it. I m sure it does it more often. One of those EPA things to stop fuel vapors from escaping into the atmosphere . Usually it come from closer to the tank but who knows how the sound it traveling.
2016 C1
Re: Mysterious electronic noise in engine bay
Yeah, I think that's what Maurice was getting at. It makes sense, since I think the EVAP solenoid is on the front of the pass side cylinder head and it's almost the only thing on that side of the engine with the exception of the fuse/relay box and the starter. Does anyone know how much voltage the solenoid gets? I think this is it:
https://www.gmpartsdirect.com/oem-parts ... cm9sZXQ%3D
https://www.gmpartsdirect.com/oem-parts ... cm9sZXQ%3D
2011 9C3: 11.48 @118.
Re: Mysterious electronic noise in engine bay
That is definitely an odd one. Could be the CAN shutting down or something on the CAN powering down. Depending on the car the CAN may stay awake for up to 30 min. Most cars just click though, this is def out there. If it was more common you could do a current draw test and trace it.
2011 9C1 with 9C3 options
95 Talon TSi AWD
Location Northern Va
95 Talon TSi AWD
Location Northern Va