U will create a fault that way by unplugging it. Then ur engine management light will come on. And have to clear the fault on a machine. Faulty will be maf sensor open circuit
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Haha no. The Escort is useless. Done it on many and never had a management light come on. Never found a code reader that read it either.
Disconnect the battery for 30mins to reset the system, then try and take it for a test drive. The ECU will re-learn.