Ford Mustang (1999-2004) Service Manual: Spark Plug - Inspection
1. Inspect the spark plug for a bridged gap.
- Check for deposit build-up closing the gap between the electrodes. Deposits are caused by oil or carbon fouling.
- Clean the spark plug.
2. Check for oil fouling.
- Check for wet, black deposits on the insulator shell bore electrodes, caused by excessive oil entering the combustion chamber through worn rings and pistons, excessive valve-toguide clearance or worn or loose bearings.
- Correct the oil leak concern.
- Install a new spark plug.
3. Inspect for carbon fouling. Look for black, dry, fluffy carbon deposits on the insulator tips, exposed shell surfaces and electrodes, caused by a spark plug with an incorrect heat range, dirty air cleaner, too rich a fuel mixture or excessive idling.
- Clean the spark plug.
4. Inspect for normal burning.
- Check for light tan or gray deposits on the firing tip.
5. Inspect for pre-ignition, identified by melted electrodes and a possibly damaged insulator.
Metallic deposits on the insulator indicate engine damage. This may be caused by incorrect ignition timing, wrong type of fuel or the unauthorized installation of a heli-coil insert in place of the spark plug threads.
- Install a new spark plug.
6. Inspect for overheating, identified by a white or light gray spots and with bluish-burnt appearance of electrodes. This is caused by engine overheating, wrong type of fuel, loose spark plugs, spark plugs with an incorrect heat range, low fuel pump pressure or incorrect ignition timing.
- Install a new spark plug.
7. Inspect for fused deposits, identified by melted or spotty deposits resembling bubbles or blisters. These are caused by sudden acceleration.
- Clean the spark plug.
Cylinder Block Core Plug Replacement
Special Tool(s) Slide Hammer 100-001 (T50T-100-A) Material 1. Use a slide hammer or tools suitable to remove the cylinder block core plug. 2. Inspect the cylinder block plug bore f ...Exhaust Manifold - Inspection
Special Tool(s) Straight Edge 303-D039 (D83L-4201-A) or equivalent 1. Place a straight edge across the exhaust manifold flanges and check for warping with a feeler gauge. Bearing ...Other materials:
Removal
WARNING: Do not smoke or carry lighted tobacco or open flame of any
type when
working on or near any fuel related components. Highly flammable mixtures are
always present
and may be ignited. Failure to follow these instructions may result in personal
injury ...
Wheel
Removal and Installation
1. Disconnect the battery ground cable (14301) and wait at least one minute
to allow the depletion
of the restraint system backup power supply.
2. Turn the steering wheel to the straight-ahead position and the ignition
switch to ...
Fuse specification chart
Power Distribution Box
WARNING: Always disconnect the battery before servicing high
current fuses.
WARNING: To reduce risk of electrical shock, always replace
the cover to the power distribution box before reconnecting the
battery or refilling fluid reservoirs ...