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full economy problem. 850 1995

posted by  REP on  Fri Sep 11 10:35 CST 2009
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last visit: Mon Jun 30 14:33 CST 2014
[RELATED]

Just had the PCV system totally replaced at 295K and had a new radiator installed as well.
But the problem is now that I got this done my full economy went from 28 - 30 mpg, down to 21 - 23 mpg.
Does anyone have any ideas as to what may be the cause? Puzzled and discouraged here. I figured I would have had an increase not the other way around.
Also, notice I get an A2 -315 code? Does something need to be replaced? If so, what? Where can I get one?

Thanks.








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    full economy problem. 850 1995

    posted by  KlausC on  Fri Sep 11 11:12 CST 2009
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    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    The A2 3-1-5 is a leak in the EVAP system, somewhere between the fuel tank, the charcoal cannister, and the intake manifold.

    As to fuel economy, I suspect one of the vacuum lines was not properly replaced, or there is a leak in the intake manifold gasket. Spray some carb cleaner at the gasket with the engine at idle and see if the idle changes, noting a leak. Dont forget the intake pipe to the throttle body or the vacuum tree.

    Klaus
    --
    I am not a mechanic, so can you trust what I type?







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