Welcome to the North American Subaru Impreza Owners Club Sunday June 20, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 06-01-2021, 12:46 PM   #1
CantPutt
Scooby Newbie
 
Member#: 290800
Join Date: Aug 2011
Location: Houston TX
Default Strange AC Noise

I've read about the chirp and power drain that can happen with AC on these cars.

I'm experienceing something more severe.

I'm having pretty hard "chirps" (I belive when compressor clutch engages) followed by a "droneish" whining noise w/ pitch that changes w/ engine rpm.

The power suck is very noticble, almost a nudge forward when it the sound kicks in. If I clutch it stops. If turn off ac it stops. It feels as if there is a lot of resistance somewhere and the engine is really fighting the compressor (or something on the belt). It's not instantaneous, the resistance is there until noise kicks off.

I'm afraid the compressor is bad (it is only one year old).

The compressor pulley seems to spin okay with the belt off.

New idler pulley did not help. Tightening belt did not help.

Any ideas? TIA.
* Registered users of the site do not see these ads.

Last edited by CantPutt; 06-01-2021 at 02:11 PM.
CantPutt is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 06-05-2021, 05:10 PM   #2
Bugeye115
Scooby Newbie
 
Member#: 217771
Join Date: Jul 2009
Chapter/Region: SWIC
Location: oklahoma
Vehicle:
2004 WRX
1984 Subaru Brat

Default

Sounds like you have too much refrigerant in the system. I had this same problem last year. Take it to a shop and have them put the appropriate amount in your system.
Bugeye115 is offline   Reply With Quote
Old 06-08-2021, 07:41 PM   #3
CantPutt
Scooby Newbie
 
Member#: 290800
Join Date: Aug 2011
Location: Houston TX
Default

That's pretty likely, I have a leak somewhere and had it recently recharged. He couldn't find the leak and thinks its in the evaporator core so he told me to just drive it and see how long it lasts before going to the effor of changing evaporator.

On another note the whining has gotten much worse and today I threw a CEL: P0420 Catalyst System Efficency Below Threshold

Would that be related to the a/c issue? I can tell my engine is really fighting the a/c.
CantPutt is offline   Reply With Quote
Old 06-08-2021, 08:13 PM   #4
D-Rodman
Scooby Specialist
 
Member#: 110078
Join Date: Mar 2006
Location: Long Island N.Y.
Vehicle:
02 Bugeye JDM STi
OBP BLACK

Default

Remove the ac belt, go without ac till you can have it properly fixed. Clear the code and drive the car, see if code returns. My guess is that it will. You are more than likely looking at two expensive repairs.
D-Rodman is offline   Reply With Quote
Old 06-09-2021, 07:17 AM   #5
CantPutt
Scooby Newbie
 
Member#: 290800
Join Date: Aug 2011
Location: Houston TX
Default

As in Catalytic convertor and something on the ac?
CantPutt is offline   Reply With Quote
Old 06-09-2021, 08:14 AM   #6
Elbert Bass
Scooby Specialist
 
Member#: 283429
Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
Vehicle:
2016 Fuji Sunfire 03
Silver

Default

First - No, the P0420 and A/C issue are not related. P0420 is catalyst efficiency meaning either your cat is bad or your A/F and/or O2 sensors are bad. You can start throwing parts at it or have it properly diagnosed.

With the A/C turned off the compressor clutch is not engaged. That will allow the pulley part where the belt grooves are to spin freely - that is normal. The front part of the pulley is connected to the compressor shaft and only engages with the pulley when the clutch coil is energized (A/C on).

As mentioned either you have too much refrigerant, there is a blockage in the system, or your compressor is failing. Have someone experienced with automotive A/C systems evaluate the system pressures and performance to properly diagnose the issue.
Elbert Bass is offline   Reply With Quote
Old 06-09-2021, 10:01 AM   #7
CantPutt
Scooby Newbie
 
Member#: 290800
Join Date: Aug 2011
Location: Houston TX
Default

Thanks all for the replies.

I dropped it off at the shop to have them diagnose the AC issue and the cat issue.

I bet there's a good chance my cat is bad becuase I was spraying a lot of oil through my turbo for a couple days before I realized it was leaking oil.

One thing after another....compressor / turbo / boost leak / cv axles / wheel bearings all within a year! (and clutch is about to go as well lol....) oh well
CantPutt is offline   Reply With Quote
Old 06-11-2021, 08:26 AM   #8
D-Rodman
Scooby Specialist
 
Member#: 110078
Join Date: Mar 2006
Location: Long Island N.Y.
Vehicle:
02 Bugeye JDM STi
OBP BLACK

Default

Old cars require parts from time to time, itís all part of the game. If you have an old car as a toy then you just fix it and donít really worry you are perhaps spending too much money on an old car. As long as the car isnít falling apart because of rust it is ok to keep feeding the monster. Let us know how it goes, good luck.
D-Rodman is offline   Reply With Quote
Old 06-12-2021, 08:00 AM   #9
CantPutt
Scooby Newbie
 
Member#: 290800
Join Date: Aug 2011
Location: Houston TX
Default

Compressor is bad (out of warranty) and cat is bad.

I guess a lot of cats are being stolen a lot and are hard to find so I might have a 2 week lead time on that.
CantPutt is offline   Reply With Quote
Old 06-12-2021, 02:36 PM   #10
CantPutt
Scooby Newbie
 
Member#: 290800
Join Date: Aug 2011
Location: Houston TX
Default

1300$ later I got the condensor/evaporator/expansion valve replaced.

Nice to have that all that whining noise and additional resistance gone.

I'll deal with the cat when they're available.
CantPutt is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 12:23 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.