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Horrible MPG in my recently gained 740GL 700

posted by  zhaoyang on  Fri Oct 15 02:15 CST 2004
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My '93 740(not a US model, driven by a K-Jetronic non-turbo engine) has a horrible MPG of 6.8 in city. It is said the car has been a gas for long.

The engine had just been rebuilt and it is powerful. The auto transmission works OK except a bit sticky.

Could anyone has any thought on it? Or I should post this at the 240 forum as no 740 in US us a K-jetronic? Any suggest is appriciated.

Mark








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    Horrible MPG in my recently gained 740GL 700

    posted by  zhaoyang on  Sat Oct 16 03:04 CST 2004
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    There's no black smoke, the plugs are dry. The only thing found today is that the tube connecting to an injector has almost unnoticeable leakage. I will fix it tomorrow but am still unsure can this small leak be responsible for the terrible amount of gas.

    Mark








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    Horrible MPG in my recently gained 740GL 700

    posted by  Rolyak on  Fri Oct 15 06:11 CST 2004
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    last visit: Fri Oct 24 08:03 CST 2014
    [RELATED]

    Make sure you have a locking gas cap! 6.8 MPG would probably exhibit lots of black smoke! A class 8 highway truck pulling 80,000 lbs. can almost do that! (5-7 mpg.)








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      Horrible MPG in my recently gained 740GL 700

      posted by  Poorgie on  Fri Oct 15 11:56 CST 2004
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      last visit: Sat Jan 12 09:01 CST 2013
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      Start out by replacing the oxygen sensor. Look over the state of the rest of the regular tune-up parts ie: plugs, cap, wires,air filter. Pay attentioin to the condition of the plugs, a wet one could indicate an injector problem.
      Poorgie

      89-745,93-245,67 P-1800








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    Horrible MPG in my recently gained 740GL 700

    posted by  NJC on  Fri Oct 15 05:49 CST 2004
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    last visit: Sun Jul 24 13:42 CST 2011
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    Not sure if this can be of help but a recent thread with respect to poor mileage:

    http://www.brickboard.com/RWD/index.htm?id=866070&show_all=1






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