Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
The oil pressure switch will need a special socket, (normally found at any autozone store and it's like) and it is right next to the distributor. Being that the age of the vehicle, and milage, it would be best to do a complete tune up on it.
1. Spark plugs
2. Cap and rotor
3 Ignition wires
4. Air filter
5. PCV valve
Let me start with the oil pressure switch. Here is a picture of it and it just unscrews, (after the wire it unplugged)
|Fig.36 Heat Shields |
On 3.9/5.2/5.9L engines, spark plug cable heat shields are pressed into the cylinder head to surround each cable boot and spark plug.
|Fig.38 Cable Removal |
- Always remove spark plug or ignition coil cables by grasping at the cable boot. Turn the cable boot 1/2 turn and pull straight back in a steady motion. Never pull directly on the cable. Internal damage to cable will result.
- Prior to removing the spark plug, spray compressed air around the spark plug hole and the area around the spark plug. This will help prevent foreign material from entering the combustion chamber.
- Remove the spark plug using a quality socket with a rubber or foam insert.
- Inspect the spark plug condition. Refer to Spark Plug Condition in the Diagnostics and Testing.
Special care should be taken when installing spark plugs into the cylinder head spark plug wells. Be sure the plugs do not drop into the plug wells as electrodes can be damaged.
Always tighten spark plugs to the specified torque. Over tightening can cause distortion resulting in a change in the spark plug gap or a cracked porcelain insulator.
When replacing the spark plug and ignition coil cables, route the cables correctly and secure them in the appropriate retainers. Failure to route the cables properly can cause the radio to reproduce ignition noise. It could cause cross ignition of the spark plugs or short circuit the cables to ground.
- Start the spark plug into the cylinder head by hand to avoid cross threading.
- Tighten spark plugs to 35 - 41 Nm (26 - 30 ft. lbs.) torque.
- Install spark plug cables over spark plugs.
The cap and rotor, you just take the scerws out from the cap, (at the distributor) and the rotor just pulls off. You don't have to loosen the hold down bolt.
The igntion wires you will want to do one at a time.
|Fig.38 Cable Removal |
When disconnecting a high voltage cable from a spark plug
or from the distributor cap
, twist the rubber boot slightly (1/2 turn) to break it loose. Grasp the boot (not the cable) and pull it OFF with a steady, even force. INSTALLATION
|Fig.40 Engine Firing Order |
Install cables into the proper engine cylinder firing order
When replacing the spark plug
and coil cables, route the cables correctly and secure in the proper retainers. Failure to route the cables properly can cause the radio to reproduce ignition noise. It could also cause cross ignition of the plugs or short circuit the cables to ground.
When installing new cables, make sure a positive connection is made. A snap should be felt when a good connection is made between the plug cable and the distributor cap
The PCV valve just pulls out also.
The ignition timing is not adjustable and there are no mixture adjustments. You may want to just clean the throttle body with some throttle body cleaner though, (I always do)