Dirt around spark plug - 1992 Hyundai Excel

Probably has dirt in it. Use compressed air and blow it clean.

stick a stiff wire down in there to loosen the dirt then blow it out with compressed air and a blow gun-cheers Denny

best thing to do is clean around the plug with maybe paper towel or blow with air before removing the plug a lil oil wont hurt but the dirt in it may scorn ur valves. good luck

1. Pull the hood release lever located under the dashboard.

2. Walk around to the front of the car, reach under the hood, find the latch and squeeze it. Open the hood.

3. Find the spark plugs, located in a row along one side of the engine (on an in-line four-cylinder engine) and attached to thick wires, called spark plug wires. Cars with V-shaped engines (which can have four, six or eight cylinders) will have spark plugs and spark plug wires on both sides of the engine.

4. Change one spark plug at a time, always putting the plug wire back on before changing the next spark plug.

5. Pull off one spark plug wire where it attaches to the plug. There is a little rubber boot at the plug end of the wire; pull on this part. Pulling higher up on the wire can damage the spark plug wire and cause it to separate.

6. Blow or wipe away any dirt or debris around the spark plug. You do not want anything to fall into the cylinder while the spark plug is out.

7. With the spark plug socket and a ratchet, remove the spark plug by turning it in a counterclockwise direction. You may need an extension for your ratchet if the spark plugs are deep-set or not directly accessible. Ratchets with flexible heads are especially helpful for hard-to-reach spark plugs.

8. Check the spark plug to make sure it needs replacing. A good spark plug should be lightly coated with greyish brown deposits. If heavy deposits are present, if the spark plug is black or if the electrode or core nose are damaged, the plug needs to be replaced.

Video - www.carbasics.co.uk - look in the 'how to' section.

Hope this is of help

Here's how to remove the spark plugs.

1. Remove the engine sight shield, if necessary.
2. Disconnect the spark plug wire from the spark plug. • Twist each spark plug wire 1/2 turn. • Pull only on the boot in order to remove the wire from the plug.
3. Loosen the spark plug 1 or 2 turns.
4. Brush or air blast away any dirt from around the spark plug.
5. Remove the spark plug. If removing all the plug at one time, place each plug in a tray marked with the corresponding cylinder numbers.

Installation Procedure

1. Inspect the spark plug gap. Adjust the plug as needed. Specification
   Spark plug gap: 1.524 mm (0.060 in)
   
2. Hand start the spark plug.
3. Tighten the spark plug. Tighten • For used heads tighten the plug to 15 N·m (11 lb ft). • For new aluminum heads tighten the plug to 20 N·m (15 lb ft). • For new iron heads, tighten the plug to 30 N·m (22 lb ft).
   

remove the spark plug leads to the plugs taking note of where they came from, blow air around the plug to remove any dirt etc that might be around the spark plug hole, if this is not done dirt may enter into the cylinder and cause damage in the future.
Remove the plug and disguard, take new plug and check the gap at the end of the plug to specifications adjust if needed.
insert the plug back into the spark plug hole and tighten to specs, connect the spark plug lead to complete the job

This could be a problem with the spark plug wires. If resistance is high or the boots have carbon tracks, they could be causing spark to go places it shouldn't. Distributor cap?
Make sure places like that are clean and dry. Check for grease or dirt inside spark plug boots. If all else fails, open the hood in the dark and look for sparks jumping around the engine when you rev it up. If so, replace the plug wires.

REMOVAL OF THE PLUGS:

Do not attempt any maintenance on spark plug if engine is hot. 
1. Disconnect negative battery terminal. 
2. Carefully remove high-tension leads. 
3. Use compressed air to blow any dirt or debris from around spark plug hole. 
4. Check that spark plug fits squarely in spark plug socket and remove spark plug.

Raise a vehicle and install SST(OK552 131 001) in order to replace cylinder 2, 4, 6 spark plug. 

INSTALLATION:

1. Install spark plug into cylinder head.

Tightening torque : 18~22lb-ft (25~30N·m, 2.5~3.0kg-m)

2. Reconnect high-tension leads. 
3. Reconnect negative battery cable. 

Hope this helps and simple to understand. Good luck

Yes sir! Those four square black modules are the distributor caps for the spark plugs - ie they distribute the high voltages to the plugs to ignite your gas that makes your car go :)

Be careful when you're unscrewing the plugs - there is likely grease, oil, or dirt around them and knocking any of this through the spark plug hole down into the cylinder is potentially damaging to the engine. Best of luck!

Spark plugs come pre gaped but, it is still always good practice to check them. They get dropped and banged around in shipping. Check to see if the plug wires are on the correct spark plugs.