Whirring & Depressurizing sounds after starting
04-15-2009, 01:12 AM
#1
TECH Apprentice
Thread Starter
Whirring & Depressurizing sounds after starting I want to say it happens more often when I haven't driven the car at all for about 8-12 hours, but I have heard it after having the car off for only an hour before...
I'll start the ignition, and there's a very very feint whirring noise. I can barely hear it above the engine noise from inside the car. Absolutely can't hear it if I'm outside the car. It'll last anywhere between 3-6 minutes. Afterwards, there's a quick depressurization type of sound (also very feint). 1 second, "psssssseeeeeeeeeeeww."
It started after I got into an accident involving a snow bank. Nothing enginewise was affected (as far as the insurance or mechanic/bodyshop was concerned). They replaced front suspension, front wheels, bumper, that general area. But after picking it up, I started noticing this sound.
Any ideas on what it might be?
I'll start the ignition, and there's a very very feint whirring noise. I can barely hear it above the engine noise from inside the car. Absolutely can't hear it if I'm outside the car. It'll last anywhere between 3-6 minutes. Afterwards, there's a quick depressurization type of sound (also very feint). 1 second, "psssssseeeeeeeeeeeww."
It started after I got into an accident involving a snow bank. Nothing enginewise was affected (as far as the insurance or mechanic/bodyshop was concerned). They replaced front suspension, front wheels, bumper, that general area. But after picking it up, I started noticing this sound.
Any ideas on what it might be?
04-15-2009, 03:13 AM
#2
TECH Regular
iTrader: (1)
Join Date: Oct 2008
Location: Riverside/Los Angeles, Ca
Posts: 416
Likes: 0
Received 0 Likes
on
0 Posts
I want to say it happens more often when I haven't driven the car at all for about 8-12 hours, but I have heard it after having the car off for only an hour before...
I'll start the ignition, and there's a very very feint whirring noise. I can barely hear it above the engine noise from inside the car. Absolutely can't hear it if I'm outside the car. It'll last anywhere between 3-6 minutes. Afterwards, there's a quick depressurization type of sound (also very feint). 1 second, "psssssseeeeeeeeeeeww."
It started after I got into an accident involving a snow bank. Nothing enginewise was affected (as far as the insurance or mechanic/bodyshop was concerned). They replaced front suspension, front wheels, bumper, that general area. But after picking it up, I started noticing this sound.
Any ideas on what it might be?
I'll start the ignition, and there's a very very feint whirring noise. I can barely hear it above the engine noise from inside the car. Absolutely can't hear it if I'm outside the car. It'll last anywhere between 3-6 minutes. Afterwards, there's a quick depressurization type of sound (also very feint). 1 second, "psssssseeeeeeeeeeeww."
It started after I got into an accident involving a snow bank. Nothing enginewise was affected (as far as the insurance or mechanic/bodyshop was concerned). They replaced front suspension, front wheels, bumper, that general area. But after picking it up, I started noticing this sound.
Any ideas on what it might be?
04-15-2009, 03:36 AM
#3
TECH Addict
The AIR pump runs for a few minutes to help heat the cats and then shuts off, that is the sound you are hearing. It may not have been working or the pump may be noisy after the accident. It's located in the left front in front of the radiator support.
04-15-2009, 07:05 PM
#7
TECH Addict
Trending Topics
04-15-2009, 07:47 PM
#8
normal. even if it was on its way out, it is useless and you're probably better off.
the air injection system is an emissions device that basically just dumps air into your exhaust manifolds to burn any unburnt fuel before it goes out the tailpipes. it has no effect on performance.
the air injection system is an emissions device that basically just dumps air into your exhaust manifolds to burn any unburnt fuel before it goes out the tailpipes. it has no effect on performance.
04-17-2009, 04:15 AM
#10
Teching In
Join Date: Nov 2008
Location: Hawaii
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
well, this clears things up. I have that sound too... i was starting to worry about it, but now i will just drive, and enjoy. Although my car has never been in an accident, is it still normal?
