Air Mass Meter 1990 240 dl

Discussion in 'Volvo 240' started by Mike Henry, Mar 2, 2004.

  1. Mike Henry

    Mike Henry Guest

    If the resistance is correct across the #2 and #3 leads on the AMM can
    it still be bad? What else should I check? If I replace it, should I
    buy it new or used. How expensive are they in US dollars?

    The car stalls and stutters at idle. I can not find any air leaks. and
    am not sure what else to look for. I have given the car a complete tune
    up including plug wires. Any other suggestions? I need some help!
    Mike
     
    Mike Henry, Mar 2, 2004
    #1
  2. Mike Henry

    Sammy Guest

    When my AMM on my 93 240 gave me trouble, I went to an electronics
    shop and bought contact cleaner (in spray). I generously sprayed the
    inside and it fixed whatever problem there was. Unfortunately, it
    will only extend the life of the AMM by about a few months. Repeating
    this procedure, I added about a year to its life.

    It makes a little while I bought one, but I believe it was more than
    $200 from the dealer.

    I've been told that they are quite sensitive to dirt.
     
    Sammy, Mar 2, 2004
    #2
  3. Mike Henry

    R Weinberger Guest

    Try using the car's computer to see if there are any fault codes
    present. It's not hard to do and requires no extra tools. Find the
    procedure on one of the Volvo sites .
    I have an '89 240 and last year my car had a bad problem, car would idle
    but that's about it, and I got a code for Air Mass Meter fault. I found
    one on Ebay for about $65 delivered, plugged it in, and it's been great
    since. I think they are a few hundred for a Bosch rebuilt. Don't get any
    other brand. But a good used one will work. If the AMM is bad be sure to
    check the hot-air ducting system for correct operation, as explained on
    Volvo sites.
    Richard
     
    R Weinberger, Mar 2, 2004
    #3
  4. Mike Henry

    Rod Gray Guest

    Unplug the AMM. If it starts and runs, it is more than likley the AMM. If
    not check the main engine wiring harness where it connects to the harness
    at the firewall and goes under the intake manifold. Cut the plastic sheath
    back and inspect the wires. We had a problem with the insulation on the
    wires getting brittle and falling off. That would cause a short on the AMM
    causing the car to die.
     
    Rod Gray, Mar 4, 2004
    #4
  5. Mike Henry

    Mike Lenker Guest

    Just a thought - have you removed and cleaned out the throttlebody and
    associated vacuum lines? Can make a world of difference, even in a car that
    seems to be running OK.

    MKL
    '91 245 5-spd
    144,000 mi
     
    Mike Lenker, Mar 4, 2004
    #5
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