Free Automotive Repair Advice by Certified ASE Technicians
How To Repair / Tune
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How to Tune Up My Car or Truck
Most vehicles have ignition systems and a
throttle bore. The vehicle's ignition system
is the component that ignites the fuel air
mixture inside the combustion chamber. When
an ignition system fails, it can cause
various symptoms such as stalling, rough
engine under power, service engine light
(check engine) and complete engine shut
down. Be sure to keep your vehicle's engine
and fuel system clean to assure the proper
operation of your vehicle. The step by step
instruction below is characteristic of today's
ignition and air intake systems. Most
vehicles today need a tune up every 35,000
to 65,000 miles depending on driving
conditions. (READ
COMPLETELY BEFORE STARTING!)
Step 1 of 8. Identify Throttle Bore (air intake
plate and bore)

Most vehicles have an air intake system
that will become clogged with air contaminants
that the air filter can not keep out of the
system. This condition is called "coking"
and can
cause stalling as well as variable idle condition and
poor mileage. The throttle bore in this
illustration has been cleaned for visual
purposes. Usually the throttle bore and
plate are coated with a dark light tar that
needs to be cleaned with every tune up.
Step 2 of 8. Cleaning the Throttle Bore and
Throttle Plate (air intake plate and bore)

Most vehicles have a throttle cable that
can be held open to help with the cleaning
procedure. Open the throttle bore and with a
cleaning towel and cleaner, (rubbing alcohol
works well) continue cleaning until the throttle bore
and plate are clean.
Step 3 of 8. Identify Tune Up Components

Most vehicles have two kinds of ignition
systems. The first is DIS (distributor less
ignition system) and COS (coil over spark
plug) no spark plug wires. If you can't
identify which system you have, follow this
link to get the right system for your car (Mitchel1).
Confirm your vehicle to determine the
tune up parts needed. A typical tune up
includes spark plugs, air filter, fuel
filter, spark plug wires, distributor cap
and
ignition rotor. You must determine which
parts are needed before you start.
Required Tune Up Parts
Before starting determine which tune up
parts are needed. Inspect the particular
system on your car or truck then purchase
the appropriate parts to complete the job.
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Purchase
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Spark Plugs - A spark plug
will last between 20,000 and 60,000
miles depending on the style of
spark plug that is required by your
specific vehicle. The spark plug is
the firing point in which the
electricity is past through a gap
to ignite the fuel/air mixture
inside the engine (combustion
chamber). |
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Purchase
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Spark Plug Wires - Spark
plug wires need to be changed every
time a tune up is performed. With
today's ignition systems, the running
voltage and amperage is higher than
ever; even more reason to service
your spark plugs wires before they
burn out and cause a misfire. |
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Purchase
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Ignition Rotor - An ignition
rotor is used to relay the
electrical spark from the ignition
coil to the terminals on the
distributor cap and then on the sparkplug wires and eventually to
the spark plugs. Some cars and trucks
do not use a ignition rotor so
inspect your vehicle before you
start. |
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Purchase
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Fuel Filter - Fuel filters
will last up to 5,000 miles or more
depending on the type of driving you
do. If you live in a dusty area like
the desert or if there is extreme
moister in your area, you can expect to change
your fuel, oil and air filter more
often. Make sure to replace your
fuel filter at regular intervals to
insure the safety of your vehicles
fuel injection system. |
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Purchase
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Distributor Cap - A
distributor cap is the component
that allows the ignition spark from
the ignition coil and separates it
into the individual spark
plugs as it rotates inside the
ignition distributor. Some cars and
trucks do not use a ignition rotor so
inspect your vehicle before you
start. |
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Purchase
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Air Filter - Air filters
will last up to 3,000 miles or more
depending on the type of driving you
do. If you live in a dusty area like
the desert or if there is extreme
moister you can expect to change
your oil and oil filter more often.
Make sure to inspect your oil level
at regular intervals to insure the
safety of the internal
parts system of your vehicle. To inspect or change
your air filter follow the
instructions above. |
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Purchase
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Oil Filter - Oil filters
will last up to 3,000 miles or more
depending on the type of driving you
do. Different oil types, like
synthetic, give you more mileage
between services. If you don't know
when the last oil change was on
your vehicle and would like to
determine were you stand, remove the
oil level inductor and check the
clarity of the oil. If it is light
colored like tea, you are ok. If it is
dark like Coke, it is time for
service. We recommend top quality
oil filters and motor oils for you
car or truck. |
Also see:Additional "How to" Car Repair or Services
1.How to Replace Air Filter
2.How to Change a Cabin filter
3.How to Change Oil and Filter
4.How to Tune Up with Throttle Bore Service
5.How to Replace a Radiator
6.How to Replace Fuel Filter
7.How to Read Trouble Codes
8.How Filters Work
9.How to Replace Front Brake Pads
10.How to Replace Rear Brake Pads
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