More or lesssiy..
Unlike the ESC-2 on teh 1800 pinto the TFI has no idea about anything other than a distributor signal.
ESC2 gets vacume load data and can work out the spark timing.
TFI can't work out anything other that static spark timing on it's own. the TFi will spark at a preset timing interval if left to it's own devices. it does however relay the PIP ( Profile ignition Picup ) signal from the dizzy to the silver box ( the EEC-IV ECU) which process that data, combines it with the data from the coolant, air flow, air temperature and speed sensor. and then sends a SAW ( spark angle word ) back to the TFI to fine tune the spark, and at the same time controls the injectors.
Fuel injection of this era is very simple yet very effective. Modern systems are not vastly advanced, usualy just adding emissions control valves and sensors.
TT
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