328 stalls with AC on

Discussion in 'Technical Q&A' started by Dla, Jun 3, 2004.

  1. Dla

    Dla Karting
    Silver Subscribed

    Nov 10, 2003
    Atlanta GA
    Full Name:
    Lee Anderson
    I have a 1988 328. She runs fine and idle's well. However, when I cut on the AC, she will stall as I pull up to a stop sign. Is this as simple as turning up the idle to allieviate this problem? Any suggestions?
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  3. Smiles

    Smiles Moderator
    Moderator Owner

    Nov 20, 2003
    Pittsburgh, PA
    Full Name:
    Matt F
    I would definitely not increase the idle speed to mask the problem. Find out what's going wrong and fix it.

    Do you know if the A/C is working? (If, say, you turn it on at 2000 rpm.) The A/C clutch may be seized, or you could have some other problem. I wouldn't be able to tell from here, but I hope it helps.

  4. f355spider

    f355spider F1 World Champ
    Rossa Subscribed Owner

    May 29, 2001
    What is your warm idle setting? It should be around 1k rpm, +- 100 rpm. If it is stalling, you could bump it to the high side (arond 1100rpm). If it is already at or above that, then you have another problem...usually their is a circuit that bumps the idle up when you engage the A/C.
  5. DGS

    DGS Four Time F1 World Champ
    Rossa Subscribed

    May 27, 2003
    Full Name:
    Not on a 328.

    CIS is a mechanical system. There is no ECU to link to, that way.
  6. Lawrence Coppari

    Lawrence Coppari Formula 3

    Apr 29, 2002
    Kingsport, TN
    Full Name:
    Lawrence A. Coppari
    There is something else wrong with you idle. At idle, I can let out my clutch and car will move away without stalling. That is a lot more load than an AC. I cannot even see a tach drop when I turn on my AC at idle. You've got some other problem.
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  8. 328Matt

    328Matt Karting

    Dec 3, 2003
    Full Name:
    I had that problem on my car.The fault was an air leak on one of the plenum chamber gaskets.

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