Bad fuel mileage | Ford Escort Owners Association (FEOA)
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Bad fuel mileage

Discussion in '2nd Gen 1991-1996 1.9L SOHC' started by 2doorLX, Apr 19, 2013.

  1. 2doorLX

    2doorLX FEOA Member

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    I have a 1995 Mercury Tracer Wagon Trio edition, automatic transmission, 138,XXX miles :D (equal to a 95 ford escort wagon LX). Right now it gets about 20 mpg (estimated). I know I have a fuel leak, and will look at that tomorrow. Plugs and wires are good. What else should I check to increase fuel mileage? :whistling:
  2. Jaschiero

    Jaschiero FEOA Member

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    Tire air pressure, clean air filter, check fluids and oils, and don't go over 80 mph... (kills my mpg every time)
  3. t3chn1c

    t3chn1c FEOA Member

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    Pretty much everything Jaschiero said, make sure plugs are firing correctly also is only other suggestion. Change your fuel filter as it probably never has been. I usually will do that when I change out plugs and wires.
  4. Jaschiero

    Jaschiero FEOA Member

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    I have yet to change mine... I wonder what my MPG would be if I do! (36 mpg hwy @75 mph)
  5. zzyzzx

    zzyzzx FEOA Member

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  6. 2doorLX

    2doorLX FEOA Member

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    well I found 1 Problem. It is the air filter. It doesn't have one!!!:shifty:
  7. millball

    millball FEOA Donator

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    I there is no air filter, the MAF sensor is very likely dirty. Clean it with one of the sprays that are made to go this. Dirty MAF can mess up your MPG for sure.
  8. zzyzzx

    zzyzzx FEOA Member

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    I agree! The lack of a air filter all by itself isn't going to cause a gas mileage issue. It's a dirty MAF sensor
  9. Jaschiero

    Jaschiero FEOA Member

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    How long have you been running with no air filter????
  10. Intuit

    Intuit FEOA Member

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    All that grit roaming around in the cylinders may have screwed-up your compression rings.

    BTW when I cleaned my MAF, MPG seemed to drop slightly, in exchange for a much smoother-running engine and stable idle. I had a lean O2 sensor at the time though.

    A dirty MAF will under-detect airflow which in theory, means your air/fuel ratio will be lean on fuel. O2 readings may cause the PCM to enrich the mixture.
  11. Intuit

    Intuit FEOA Member

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    Oh no one has mentioned dragging-brake(s) yet.
  12. 2doorLX

    2doorLX FEOA Member

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    OK. Replaced air filter, and cleaned MAF sensor. When I took off the air filter housing, the hose to the MAF came off. It may have been installed backwards!!:mad: Replaced everything and test drove. It is a lot quieter now, and I will check on MPG. Also a gas smell (Filler Hose was already replaced)
  13. Intuit

    Intuit FEOA Member

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    "Hose to the MAF" ??
    MAF and ACT sensors only have wires to them.
    They are both secured to the "domed" part of the air cleaner housing.
    From the bottom of the air cleaner housing, you have a hose running to the valve cover. (part of the PCV system)

    Were you referring to the intake plenum to air-cleaner hose ?

    If you need more detail about hose routing, just ask. No telling what else the previous owners screwed with... and screwed-up!

    Regarding fuel vapor, in addition to the rubber fuel filler neck hose, I had developed a leak at the fuel-sender tank seal ring. It was basically my fault as didn't make sure that *all* debris and corrosion was removed, scraped-away the last time I had it off. Purchased a new tank seal ring and lock-ring.

    Beneath the air cleaner is the charcoal vacuum cannister. It has a vacuum line running back to the fuel filler neck. It has another line running to little electronically actuated valve, and from that valve to the bottom of the throttle/intake plenum. Fuel vapors rot those hoses at an accelerated pace. Another possible source for escaping fuel vapor is the fuel filler cap itself.
  14. 2doorLX

    2doorLX FEOA Member

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    Ok Air intake Plenum to air intake was backwards. Cleaned MAF, and the tracer is quieter Now. On a 1/4 tank I have over 70 miles, and I am still checking. Fuel cap is OK, Brakes are OK, Have to check all of the other lines.

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