Results 1 to 5 of 5

Thread: AC Compressor Misfiring

  1. #1
    New User
    Join Date
    Dec 2009
    Posts
    10
    Points
    5,088
    Level
    45
    Points: 5,088, Level: 45
    Level completed: 69%, Points required for next Level: 62
    Achievements:
    O.G.5000 Experience Points

    AC Compressor Misfiring

    I have a 99 Subaru Legacy SUS with an EJ25D engine. Car has 180K miles on it. Recently I replaced the AC Compressor. The compressor works and blows cold air. Recently I have noticed that the car seems to misfire when the compressor is on. It doesn't happen all of the time but it always stops when I turn the AC off and resumes when I turn the AC on. I don't have any error codes for cylinder misfiring and thus I don't think it is a problem with the spark plugs or wires. I also hear a screeching noise caused by the belt. However these two things don't always happen at the same time. I have gotten the misfiring effect with no noise at all. Any ideas?

  2. #2
    t3h ub3r m3mber r3v_v3ng3's Avatar
    Join Date
    Sep 2009
    Location
    209 NorCal
    Posts
    1,684
    Points
    13,292
    Level
    75
    Points: 13,292, Level: 75
    Level completed: 11%, Points required for next Level: 358
    Achievements:
    O.G.10000 Experience Points
    Perhaps you have a wobbly crank pulley?

  3. #3
    New User
    Join Date
    Dec 2009
    Posts
    10
    Points
    5,088
    Level
    45
    Points: 5,088, Level: 45
    Level completed: 69%, Points required for next Level: 62
    Achievements:
    O.G.5000 Experience Points
    I tried to move it with my hands and it felt pretty secure. Is there a better method to test the crank pulley?

  4. #4
    New User
    Join Date
    Dec 2009
    Posts
    10
    Points
    5,088
    Level
    45
    Points: 5,088, Level: 45
    Level completed: 69%, Points required for next Level: 62
    Achievements:
    O.G.5000 Experience Points
    I recently had someone remove the plastic adjuster and manually adjust the belt. This seems to be working.

  5. #5
    t3h ub3r m3mber r3v_v3ng3's Avatar
    Join Date
    Sep 2009
    Location
    209 NorCal
    Posts
    1,684
    Points
    13,292
    Level
    75
    Points: 13,292, Level: 75
    Level completed: 11%, Points required for next Level: 358
    Achievements:
    O.G.10000 Experience Points
    Sounds like the a/c belt was too tight. If it was loose then it would of squeal.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •