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replacing air mass meter? 700 1990

posted by  someone claiming to be flacito on  Wed Nov 15 12:20 CST 2006 [RELATED]

I have 190,000 miles on this vehicle and am having high revs and bumping problems with the engine. Have never had the air mass meter replaced and was wondering how long do they last, at that mileage is it time for another one?








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    replacing air mass meter? 700 1990

    posted by  TONY H on  Thu Nov 16 05:31 CST 2006
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    last visit: Fri Oct 17 16:39 CST 2014
    [RELATED]

    Do 700's have Idle Control Valves? sounds like that is a good place to start.

    AMM's don't have a Life like many things. I have over 250K miles on my original.


    I'd also look at cleaning the Throttle body
    --
    '75 Jeep CJ5 345Hp ChevyPwrd, two motorcycles, '85 Pickup: The '89 Volvo is the newest vehicle I own. it wasn't Volvos safety , it was Longevity that sold me








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    replacing air mass meter? 700 1990

    posted by  Aye Roll on  Wed Nov 15 16:29 CST 2006
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    last visit: Tue Oct 14 21:08 CST 2014
    [RELATED]

    Air Mass Meter problems are usually related to poor running when cold, or even a no-start condition in LH 2.4 cars, and if they fail completely, can cause stalling under medium to high load conditions.

    It doesn't sound like any of these. I'm assuming the car is a turbo? You didn't say- most 740 non-turbos wouldn't have an AMM anyway in 1990. California cars however, would have one typically.
    --
    ::: Rob Bareiss, New London CT ::: 92 244 M47 211K ::: 90 745GL M47 273K ::: 88 245DL AW70 190K ::: 84 242DL Project ::: 70 VW Bus ::: 70 VW Pickup Project ::: 71 VW Notchback :::








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      replacing air mass meter? 700 1990

      posted by  jwhorto on  Wed Nov 15 19:18 CST 2006
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      last visit: Fri Sep 2 12:03 CST 2011
      [RELATED]

      Rob,
      I believe that all 740's (In the USA)that are non-turbo would have an Air Mass Meter.
      I could be wrong. Please correct me if I am not.

      Thanks,
      jeremy
      --
      71 142E and a yard full of 240's in Mass.








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        nope 700 1990

        posted by  interstition on  Thu Nov 16 00:01 CST 2006
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        last visit: Mon Apr 28 10:13 CST 2014
        [RELATED]

        In the USA, all 740s up to 1989 had an AMM. From 1990 on, turbo 740s kept the AMM while n/a cars have Rex/Regina engine management so they have a MAP sensor and manifold temp sensor instead. (This cut off date is approximate as I have read of '89s with Regina and '90s with LH 2.4) The exception is California, where the n/a cars got an EGR valve and kept the AMM (not sure of years).

        This info is just what I have gleaned from reading the BrickBoard for the past years. I own three n/a 740s with no AMM.
        --
        Andy in St. Paul - '91 745 218K mi, '91 745 210K, '90 744 189K, all Rex-Regina - past 240s








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    replacing air mass meter? 700 1990

    posted by  someone claiming to be rod on  Wed Nov 15 14:06 CST 2006 [RELATED]

    "high revs and bumping problems"

    Sounds more like dirty ICV/throttle body.







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