The document provides step-by-step instructions for performing an engine tune-up, which includes checking and replacing the air filter and spark plugs. It discusses the procedures for removing and installing spark plugs, including inspecting, cleaning, and regapping new spark plugs. Similar procedures are outlined for checking and replacing the air filter and fuel filter. Indicators of when filters need replacement are also listed, such as reduced gas mileage or strange engine noises.

1. ENGINE
TUNE-UP
TO BE PRESENTED
BY GROUP 2

2. To Be Discussed:
01
What is
engine tune-
up
03
The procedures of
checking and
replacing the air
filter.
02
The procedures of
removing and installing
spark plugs.
04
The indicators of a
bad and good air
filter.

3. To Be Discussed:
05
The procedure of
check and replace
of fuel filter. 06
The signs and
indicator of a bad
fuel filter.

4. WHAT IS
ENGINE
TUNE UP
01

5. ● A tune-up is, broadly, a service in which your
mechanic does a thorough inspection of your
engine and then replaces or repairs all the
components that have worn down or aged. So,
there are many services that can be performed at
a tune-up. Whether you have a car with an older
ignition system or a new one, it's necessary to
have a tune-up done when your vehicle's owner
manual requires it. If you don't, you run the risk of
having your vehicle run poorly. A properly tuned
vehicle will run smoothly and perhaps even see
better fuel economy.
ENGINE TUNE UP
01

6. PROCEDURE OF
REMOVING AND
INSTALLING
SPARK PLUGS
02

7. ● Park your vehicle on a flat, dry surface and ensure the
engine is cool. Clean the engine area of any dirt and
debris to prevent anything from falling into the engine
cylinder during spark plug replacement. Additionally, you
may want to disconnect the battery (negative post only).
Check the vehicle repair guide or other resources to
ensure no damage will occur if the
battery is disconnected for any length of
time or if any modules or other items
would need to be reprogrammed.
SAFETY FIRST

8. ● First, remove any interference items. If your vehicle requires
removal of the upper intake plenum, a new gasket will be
needed. After gaining access, you will likely find the rubber
spark plug wire end and inside metal terminal somewhat
difficult to remove from the spark plug. You must be careful to
avoid damaging the rubber boot or tearing the wire terminal
away from the plug wire end. If you discover the plug wire boot
is ‘stuck’ to the spark plug try using spark plug wire pliers to
aid in removal. The boot may need to be twisted back and
forth to break the bond from the spark plug.
REMOVE THE SPARK
PLUG WIRE

9. ● COP designed coils attach directly to the spark plug end and use a long
rubber insulator boot. Start the removal process by disconnecting the
electrical connector from the ignition coil. Press down or pull up on the
locking tab to make the connector release so it can be disconnected. A
small screwdriver may be needed to help depress the locking tab. Once
the connector is off, remove the hold down bolt and carefully twist the coil
about a quarter turn or so back and forth until the ‘bond’ is broken. Then it
should pull straight up and out. Use caution! There is always a risk of
damage to the COP boot. COP coils and their insulator boots are made of
plastic and rubber that protect and insulate the high voltage conducting
materials inside.
REMOVE THE COIL ON
PLUG (COP)

10. ● Be sure the engine is cooled off. Use a spark plug socket to remove the
spark plugs. Avoid thread damage by following these suggested steps.
On COP applications remove debris by blowing air down into the spark
plug well hole. Even the tiniest of particles can build up in the threads of
the spark plug during removal and cause damage to the cylinder head
threads. If this occurs, sometimes a spark plug thread restorer tool may
be used to do just that, restore damaged threads in the cylinder head.
Next, loosen/turn the spark plug about a half a turn counter-clockwise
and blast a small shot of penetrant fluid to the base/ thread area of the
spark plug. Allow a few minutes to soak.
UNSCREW THE SPARK
PLUG

11. ● Before installing the new spark plugs, ensure each plug part
number matches the part number and box description. Inspect
each new spark plug for damage. Ensure the threads are clean
and straight, the electrode and tip are intact, and the insulator for
the plug wire or COP boot is not cracked or chipped. Some
brands of spark plugs come ‘pre-gapped’ and require no ‘re-
gapping’. For these spark plugs, make sure the tip is not bent or
damaged. For other brands and plug types, check the gap to
make sure it matches your engine's plug gap specification. A
gaping gauge tool is available from AutoZone. A small amount of
anti-seize maybe used on most but not all spark plug brands and
types.
PUT IN NEW SPARK PLUGS

12. ● Apply a small amount of plug wire grease to the plug wire
boot (or COP boot) and re-install each plug wire or ignition
coil. Be sure and connect the plug wires to the appropriate
spark plug for each engine cylinder (refer to a firing order
diagram if necessary). Re-install the coil hold down bolt(s).
Re-attach the electrical connector(s). Re-install all other
components removed to gain access. Be sure and gather up
all tools and the engine is free and clear to start. Remember
to reconnect the battery if it was disconnected at the
beginning.
RE-INSTALL THE SPARK PLUG
WIRES OR IGNITION COILS (COP)

13. ● Starting the engine after the spark plug
replacement is a good way to validate
your work.
START UP THE ENGINE

14. The procedures of
checking and
replacing the air filter.
03

15. ● Open your car’s hood and find the engine
air filter housing. It’s a black plastic box that
sits on top of or to the side of the engine.
You will see a large hose sticking out of its
side.
FIND THE AIR FILTER
HOUSING

16. ● Open the air filter housing and take out the old air filter (use caution when
removing the housing cover as it may have wiring harness and electrical
components attached to it). The air filter housing can be fastened
together with screws, clips, clamps or wing nuts. Take note of what kind
of fasteners are used and select the appropriate tool to remove them. To
open the air filter housing, you simply remove the fasteners, remove the
top of the air filter housing and take out the air filter. Remove any dirt or
debris that is in the housing by wiping it out with a rag.
REMOVE HOUSING COVER

17. ● Inspect the old engine air filter to make
sure that it is dirty and needs changing.
Look inside the pleats, if you see a lot of
dirt, it is time to change the air filter. You
can also tap the filter and if dirt falls out,
your air filter is past its prime and needs
replacing.
INSPECT

18. PLACE NEW ENGINE
Place the new engine air filter in the filter box. Insert it
with the rubber rim facing up. Ensure that it is seated
correctly.

19. PLACE NEW ENGINE
Place the new engine air filter in the filter box. Insert it
with the rubber rim facing up. Ensure that it is seated
correctly.
PUT IT BACK ON
● Put the top of the housing back on and put the fasteners
back on. That’s it! You have replaced your air filter and
saved a bunch of money by doing the job yourself.

20. ● Air Filter Appears Dirty.
● Decreasing Gas Mileage.
● Your Engine Misses or Misfires.
● Strange Engine Noises.
● Check Engine Light Comes On.
● Reduction in Horsepower. ...
● Flames or Black Smoke from Exhaust Pipe.
● Strong Fuel Smell.
INDICATORS OF BAD FILTER

21. THE
PROCEDURE OF
REPLACING
FUEL FILTER.
04

22. Disconnect the
battery.

23. Locate the fuel
filter.

24. Jack up the car if
necessary.

25. Place a bowl or
bucket beneath
the fuel filter.

26. Remove the clips
holding the fuel
filter in place

27. Remove the
fuel lines
from the
filter

28. Slide the fuel
filter out of
its bracket

29. COMPARE THE NEW FILTER
TO THE OLD ONE
When less fuel can pass through the
filter, it is time to change it. Before
installing the new fuel filter, compare
it to the one you just removed. Make
sure they appear to be the same
outside diameter, that the nozzles
are the same size, and that it will fit
into the bracket.

30. SLIDE THE NEW FUEL
FILTER INTO THE BRACKET
The new fuel filter should easily
slide into its bracket. If you have to
force it, it is likely not the correct
diameter. The fuel filter should stop
when it is seated properly, as it
should only be able to slide all the
way out in one direction

31. FASTEN THE FUEL FILTER
TO THE FUEL LINE.
Slide the fuel lines onto the front and
back of the filter the same way they
were attached to the old one. With
the fuel line in place on the filter,
slide the plastic clips through the
holes on the fuel line nozzle to
secure the line in place on the fuel
filter.

32. LOWER THE VEHICLE OFF
OF THE JACK STANDS.
Jack up the car to relieve the weight
on the jack stands, then slide them
out from beneath the vehicle. Once
the jack stands are clear, lower the
vehicle to the ground by either
releasing the pressure in the jack or
turning the jack handle counter-
clockwise, depending on your style
of jack

33. ● Misfire or rough idle.
● Vehicle stalling.
● Fuel system component failure. .
● Loud noises from the fuel pump.
● You have a hard time starting the
car.
INDICATORS OF BAD FUEL
FILTER

34. END OF OUR
DISCUSSION

35. THANK
YOU!!

36. MEMBERS
Mangay, Maria
Fatima S.
Anzures, Karyle
Cassandra R.
Reginaldo,
Elsen Veronica
Alcantara, Feona
Francine I.
Esteves, John
Michael L.
Freo, Vhinz
Levy B.

37. MEMBERS
Deriquito, Antero
Joakim T.
Mirondo, John
Carl G.
Del Mundo, Angel
Sophia S.