jmedia -
Welcome to EM! Pardon my ignorance, but is the 1989 Escort fuel injected? That era was "on the cusp" of switching from carburetors to FI. If you are carbed, then I believe the MPGuino won't work for you. Hrmmmm, EFI is in your domain :
Ford CVH engine - Wikipedia, the free encyclopedia
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1.9 [liter engine]
The CVH was bumped up to 1.9 L for the North American 1986 model year Escort. Bore was now 82 mm (3.2 in) and stroke was up as well to 88 mm (3.5 in). This stroke length would be used in the 2.0 L CVH engines, and continued into the Zeta engine which replaced it. This long stroke necessitated a raised engine block deck, a design also shared with later units. Output was 86 hp (64 kW) and 100 ft·lbf (135.581794833 N·m) with a carburetor; when electronic throttle-body fuel injection was added, the basic 1.9 L added 4 hp (3.0 kW), although torque was little changed.
Electronic fuel injection and hemispherical "hemi" combustion chambers were added for 1987's Escort GT, bumping output to 108 hp (81 kW) and 114 ft·lbf (155 N·m). This engine developed a good reputation for performance and surviving GTs of this generation are quite fun to drive.
The 90 hp (67 kW) 1.9 L of the late 1980s, particularly when equipped with either the four- or five-speed manual transaxle, was notable for delivering outstanding fuel economy. Somewhat surprisingly, four-speed Escort Pony models achieved better mileage than five-speed cars, with upwards of 30 mpg in city driving and 40–45 mpg on the highway not uncommon.
The second generation of American Escort got sequential EFI for 1991-1996, but power and torque was little changed at 88 hp (66 kW) and 108 ft·lbf (146 N·m) respectively.
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I wonder if you have a "Pony" :
http://en.wikipedia.org/wiki/Ford_Escort_(North_America)
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Finding some popularity during the final three years of this generation was the Pony model, which was the least-expensive U.S.-built Ford at the time. Pony models used plainer interior trim with greater use of vinyl and plastic instead of cloth, and a 4-speed manual transaxle was standard, although buyers could opt for the 5-speed found in LX models or the 3-speed ATX automatic. The list of available options was very limited, to the extent that such luxuries as power steering and factory-installed air conditioning were not offered (a dealer-installed A/C system was available). Given their lighter weight, Pony models were known for their ability to deliver excellent fuel economy—mileage upwards of 40 mpg-US (5.9 L/100 km; 48 mpg-imp) in highway driving was not uncommon.
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CarloSW2