Get rid of bad fuel
injectors and save your engine parts from getting ruined by shopping for high
quality auto engine parts from Partsavatar Car parts Canada.
Fuel injection is the
most common way which the modern internal combustion engines use to deliver the
fuel. Almost every auto vehicle is equipped with fuel injectors. Car Fuel injector
is a pivotal component of vehicle’s fuel system as it helps to spray the fuel
into engine with the help of injector nozzle.
Any problems with fuel
injectors can cause malfunctioning of engine and its components. Under worst
condition it may stall your car. For a better fuel economy and optimal
performance of vehicle’s engine it is very important for the fuel injectors to
work properly.
What
is a Fuel Injector?
Fuel injector sounds to
be quite a complex terminology but it isn’t. They are the components that are
responsible for the final stage of fuel delivery in fuel injection systems.
Fuel injectors are mostly controlled by car’s ECU
and fuel injectors are activated by this ECU or auto fuel injector module
when the high pressure fuel is passed to the injector.
There are few types of
fuel injectors. They all differ in design while the working is still the same. Let’s
have a look at main 3 types of fuel injectors in detail.
2. Centrally located/ central
port injection
3. Located at each
cylinder/ multiport injection
Throttle
body injection
In throttle body
injection system, the fuel injector is built right into the throttle body. This
simplest single point fuel injection system consists of a single injector that
slot into the throttle body.
Throttle body injector
is similar to other standard fuel injectors but it is responsible for
delivering the fuel to entire engine rather than just one cylinder. When it is activated, it sprays a mist of fuel
into the throat of throttle body where it mixes with air and passes to the
intake manifold.
This air fuel mixture
plays vital role in engine’s internal combustion process.
You can simply replace
old or worn throttle bodies with new throttle bodies by simply unbolting the
injector.
Central
Port Injectors
Unlike throttle bodies,
in central port injectors a single maxi injector is used to provide the fuel to
all cylinders. It is sometimes termed as hybrid port injectors as its central
injector is connected to each intake port via nylon fuel lines.
Major components of
central port injectors are:
1. Poppet Valve Nozzle
2. Nylon fuel lines
It has one drawback. As
the injectors work as a single unit, so if any component fails, the entire unit
will have to be replaced instead of the single component.
Multiport
Fuel injectors/Direct Port Injectors
Most of the diesel and
gasoline engines today use multiport or direct fuel injectors which both use
similar fuel injectors. These injectors are responsible to deliver fuel to
single cylinder. The major difference between auto multiport injectors
and direct injectors is that the multiport injectors deliver fuel to the intake
at each intake port and direct fuel injectors spray the fuel into each
combustion chamber of the engine.
How
does a Fuel Injector work?
Fuel injectors can be
further differentiated into Poppet valve Fuel injectors and Pintle valve fuel
injectors.
Fuel injectors that
operate using pintle valve use solenoids to function. The ECU activates the
solenoid which causes it to undergo linear movement and this linear motion
causes the pintle to move away from its position. A mist of highly pressured
fuel then begins to spray from the pintle nozzle.
But in case of fuel injectors
that operate using poppet valves, fuel pressure is used instead of solenoid.
The maxi injector receives constant amount of pressurized fuel which is
delivers to each cylinder with the help of nylon lines. After reaching
sufficient level of pressure, the poppets are forced to open which results in
fine mist spraying into intake port. When the pressure decreases, the valve
poppet valve closes again.
When
to replace Fuel Injectors?
When a fuel injector
begins to fail due to contamination, it typically needs to be replaced. Let us
look at some common symptoms to look for when you need fuel injector
replacement.
Restrictions
in the fuel injectors
A restriction of 8% to
10 % in a single fuel injector can lean out the fuel mixture and will
eventually cause an engine misfire. Direct fuel injectors are prone to
restrictions as the precise amount of fuel is injected into combustion chamber.
Increase
or Decrease in long and short term fuel trims
If a fuel injector
becomes too clogged with fuel varnish deposits and fails to deliver its normal
dose of fuel the PCM may not be able to increase the injector. Sometimes fuel
pressure can also be affected by weak fuel pump or leaky fuel pressure
regulator.
This phenomenon will
eventually result in a lean air fuel mixture and will ultimately cause misfire.
Engine
Misfire and decrease in fuel economy
It is one of the most
common symptoms of a failing fuel injector. You will start noticing performance
issues with engine whenever the fuel injector starts malfunctioning.
Performance problems
often arise if the air fuel mixture is tampered due to bad fuel injector. You
will notice certain symptoms like car's engine misfiring, loss in power, decreasing fuel
economy and stalled engine in worst case.
Vehicle
won’t start with full tank
Fuel contamination also
results in failing fuel injectors. Symptoms of contaminated fuel can include
hard starting, stalling, loss of power and poor fuel economy. The symptoms of
fuel contamination appear immediately after refueling. In this case, you will
also notice the fuel gauge needle pegged on full which is not a good sign.
Check
Engine light appears
A lean mixture may
trigger misfire code and turn on the check engine light. There are various symptoms of check engine light’s
appearance on dash. Call your technician to decipher the
misfire code and determine exact cause for the appearance of check engine
light.
There may be clogged
fuel injectors or electrical issues with the computer that are triggering the
check engine light to alert you. At this moment, it is best to get your
computer scanned by the technician for trouble codes.
Strong
fuel smell
As the fuel injectors
hold very high pressure while delivering fuel to chambers, this high pressure
could cause them to develop leaks at the nozzle. A leaky fuel injector will
pass fuel into the chamber while leaky seal will leak fuel at the base of
injector. It will produce a strong fuel smell. Smells are not good for engine’s
health.
So as soon as you
notice fuel smell get your car checked by a professional.
Neglected maintenance
may also lead to failing fuel injector. Contaminated fuel, not changing oil,
damaging PCV system can damage fuel injector as well as fuel pump camshaft
lobe.
Shop for high quality Remanufactured fuel injectors of cars
from partsavatar auto parts and get the
benefit of free shipping.
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