Page 101 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Check the air filter: A dirty or clogged air filter can restrict airflow to the engine, affecting performance. Check the
air filter and replace if necessary.
Check the throttle body: The throttle body controls the amount of air entering the engine. If it’s dirty or doesn’t
work properly, it can cause air intake problems. Clean the throttle body or replace as necessary.

Check the Mass Air Flow Sensor (MAF): The MAF sensor measures the amount of air entering the engine. A
faulty MAF sensor may cause incorrect fuel delivery. If the MAF sensor is not working properly, have it tested or
replaced.
Check the vacuum line: The vacuum line plays a vital role in the air intake system. Check the vacuum line for
leaks or cracks and replace if necessary.

Check the fuel system: Fuel system problems such as: Other problems such as a clogged fuel filter, fuel pump
problems, or injector problems can also affect the performance of your intake system. Check and correct any fuel
system problems.
Check for fault codes: Use an OBD-II scanner to check for fault codes related to the air intake system or engine
performance. This can provide valuable diagnostic information.
Test sensor: In addition to the MAF sensor, other sensors such as oxygen sensor (O2 sensor), throttle position
sensor (TPS), and intake air temperature sensor (IAT) will also have an impact on the intake system. Test whether
these sensors are working properly.
Check the intake manifold: Check the intake manifold for leaks, cracks or carbon deposits. Correct any problems
found to ensure proper airflow.

Check ECU/PCM Operation: The engine control module (ECU) or powertrain control module (PCM) plays an
important role in controlling the air intake system. Make sure the ECU/PCM Is working properly and update the
software if necessary.
Study about exhaust system component such as exhaust manifold and muffler
System: Under this heading, such a components used in the engine have been described, which are used for
various functions in the exhaust systems of the engine. The components of the exhaust system are as follows.
1 Exhaust manifold: This is also made in the same way as the inlet manifold. It is fastened to the block or
engine head by studs or bolts. It is used to expel the burnt gases from the cylinders. Along with this, a silencer
or muffler is added. Through this manifold, the burnt gases of all the cylinders are collected and sent to the
silencer. Exhaust manifolds are often made from cast iron.

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CITS : Automotive - Mechanic Diesel - Lesson 25 - 28