You can get the check engine light checked for free at advance auto, auto zone just about any auto part store
Your check engine light only relates to your emission system. So your problem lies somewhere there. I would disconnect the battery for 5 minutes and allow any sensor to hopefully reset. Fords love sensors..and in 89 its probably carburated, with no computer. Hopefully the check engine light returns..if so get the codes read immediately by a OBG 1 scanner..then youll know where the fault is.
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