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This depends on whether the engine is equipped with a distributor or with EDIS (Electronic Distributorless Ignition System). If EDIS, there is essentially no adjustment. If distributor, you remove the engine cover inside the vehicle and loosen/turn the distributor like any other. Get an aftermarket manual such as Chilton or Haynes for detail of procedure.

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2015-07-15 21:37:30
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Q: How do you adjust the ignition timing on a 1989 Ford Aerostar?
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