Ford — Replace Spark Plugs
Maintenance · Ignition system
From a Ford service manual covering: 2WD, 4WD, Genie S-40. Check it applies to your exact model before use.
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Before you start
- Perform with engine off.
Procedure
- Label and disconnect plug wires by grasping molded boot.
- Blow out debris around spark plugs.
- Remove all spark plugs.
- Adjust gap on each new spark plug.
- Install new spark plugs, connect wires.
Tools required
- Spark plug gap tool Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug type Motorcraft AWSF-42 Amazon eBay $34.95
- Gap 0.042 to 0.046 inches
- Torque 5 to 10 ft-lbs
Source: Ford service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.