Car Fix DIY Videos

Video tutorial on how to replace the spark plugs and wires on a Ford or Mazda 2.5L 4 cylinder twin/dual spark engine. This tutorial does no require having to remove the air plenum to gain access to the spark plugs. The replacement does involve a little more patience, but it she cheaper route in the end. This procedure possibly applies to other variations of this engine or vehicles as well. This particular vehicle I am working with is a 1998 Ford Ranger.

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Tools/Supplies Needed:
-3/8″ drive 6″ extension
-3/8″ drive 3″ extension
-3/8″ drive 5/8″ deep socket with rubber insert for spark plugs
-3/8″ drive 5/16″ socket
-standard/flat screwdriver
-needle nose pliers
-dielectric grease
-8 new spark plugs
-new spark plug wires

Procedure:
-disconnect the two electrical connector on the sensors on the intake tube
-there is simply a tab on the side with needs to be depressed and then pull the connector straight off
-using a standard/flat screwdriver, loosen the two gears clamps, one on the air filter side and the other on the throttle body side, then pull the rubber intake tube off
-if you plan on keeping the spark plug wires, take extra care when removing them which is by twisting and pulling simultaneously
-remove the plug wires from the driver’s side
-starting with the front plug on the driver’s side which has a plastic pull cap that needs to be feed between the alternator and the bracket, then kick the bottom of the boot over to one side
-next plug is fairly straight forward, just twist and pull
-remove the black plastic throttle body cap by taking out the two 5/16” bolts
-the remainder two also have the plastic caps and will need to be removed using needle nose pliers feed between the intake runners, then drop the bottom of the boots down towards the engine block and pull the tops over to the front of the engine
-remove the spark plug wires from the coil pack by depressing the tabs on each side, then twisting and pulling the wire simultaneously
-some wires might be numbered, others may not be, be sure to take the correct steps if not
-some coil packs might be numbered, others may not be, be sure to take the correct steps if not
-spark plug gaps should be set by the manufacturer, but always make sure just to double check that using either a spark plug gapping tool or feeler gauges
-the specifications are printed on a white tag located on the rad support and are .042 to .046 thousands of an inch
-for the first spark plug, use a 5/8″ deep socket with a rubber insert, 3″ extension, 6″ extension, and a 3/8″ drive ratchet
-second spark plug, use a 5/8″ deep socket with a rubber insert, 3″ extension, 6″ extension, and a 3/8″ drive ratchet
-third spark plug, use a 5/8″ deep socket with a rubber insert, 6″ extension, universal joint, 3″ extension, and a 3/8″ drive ratchet
-forth spark plug, use a 5/8″ deep socket with a rubber insert, 6″ extension, universal joint, 3″ extension, and a 3/8″ drive ratchet
-install the new spark plugs for the driver’s side
-the new spark plug wires that were purchased for this truck are numbered, but yours may not be
-whether they are numbered or not, be sure to double check and match up the wires
-install the plastic boot caps on the correct wires
-remove the plastic wire retaining clips and they can be installed before or after you finalize the positioning of the wires
-feed the new wires into place, in reverse of removal
-if you wish, you can also apply some dielectric grease to the tips of the spark plugs which prevents moisture affecting the tips or a chance of corrosion
-remove the spark plug wires on the passenger side
-with the first spark plug to the rear of the engine on the passenger side, use a 5/8″ deep socket with a rubber insert, 6″ extension, and a 3/8″ drive ratchet
-this also applies to the second and third plug on the passenger side, use a 5/8″ deep socket with a rubber insert, 6″ extension, and a 3/8″ drive ratchet
-as for the last spark plug, remove the electrical connector on the coil pack by pulling apart the clips and pulling straight off, then use a 5/8″ deep socket with a rubber insert, 6″ extension, and a 3/8″ drive ratchet
-install the new spark plugs
-install the new wires and ensure they are appropriately matched
-then install the rest of the parts in reverse of installation

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