Professional Motor Mechanic

‘Broadband’ Lambda sensor – function and role

|Date: August 13, 2012

‘Broadband’ Lambda sensor – function and role

With the ever greater demand to reduce fuel consumption and to lower exhaust emission levels, it has beco ...

With the ever greater demand to reduce fuel consumption and to lower exhaust emission levels, it has become necessary to operate engines away from the stoichiometric fuelling point under certain condi ...

August 13, 2012
Read more
MAF sensors – fitting and diagnosis issues

|Date: August 08, 2012

MAF sensors – fitting and diagnosis issues

Function and operationThe main function of the Mass Air Flow (MAF) sensor is to measure the volume of air ...

Function and operationThe main function of the Mass Air Flow (MAF) sensor is to measure the volume of air passing through it, and therefore into the combustion chamber of the engine. This measurement ...

August 08, 2012
Read more
Lambda sensors – installation tips and common problems

|Date: June 26, 2012

Lambda sensors – installation tips and common problems

Diagnosis and investigationTo correctly test and diagnose a Lambda problem it is important to understand ...

Diagnosis and investigationTo correctly test and diagnose a Lambda problem it is important to understand what measurements you’re looking for as output. Early O2 sensors work on voltage, Titania senso ...

June 26, 2012
Read more
Zirconia switching Lambda sensor – function and operation

|Date: June 26, 2012

Zirconia switching Lambda sensor – function and operation

There are basically three different, non-interchangeable types of Lambda sensor. The zirconium dioxide an ...

There are basically three different, non-interchangeable types of Lambda sensor. The zirconium dioxide and titanium dioxide Lambda sensors are also called switching, voltage jump or ‘binary’ sensors, ...

June 26, 2012
Read more
Ignition coils and MAF sensors – fault finding and installation

|Date: June 26, 2012

Ignition coils and MAF sensors – fault finding and installation

IGNITION COILSInstallation1. Carefully place the replacement ignition coil into the plug hole of the cyli ...

IGNITION COILSInstallation1. Carefully place the replacement ignition coil into the plug hole of the cylinder head, orienting it the same way as the original sensor.2. Connect the ignition coil to the ...

June 26, 2012
Read more
Fault diagnosis and testing – MAF and Lambda sensors

|Date: June 26, 2012

Fault diagnosis and testing – MAF and Lambda sensors

MAF sensorsMAF sensors can produce driveability symptoms without generating an engine management warning ...

MAF sensorsMAF sensors can produce driveability symptoms without generating an engine management warning light.Typical symptoms■ A no start condition■ Extended crank time when engine is cold■ Stalls a ...

June 26, 2012
Read more
Inductive sensor failure diagnosis and troubleshooting

|Date: June 26, 2012

Inductive sensor failure diagnosis and troubleshooting

The inductive sensor (inductive type pulse generator) works on ‘Faraday’s Law’ and the basic contents of ...

The inductive sensor (inductive type pulse generator) works on ‘Faraday’s Law’ and the basic contents of the sensor are a coil (winding), a magnetic field and ‘movement’. By using this principle, it i ...

June 26, 2012
Read more
Proton Impian with a camshaft sensor issue

|Date: June 26, 2012

Proton Impian with a camshaft sensor issue

The problem: A Proton Impian was suffering from intermittent starting problems, and the vehicle randomly ...

The problem: A Proton Impian was suffering from intermittent starting problems, and the vehicle randomly cut out. This caused the engine warning light to illuminate. The first stage of the investigati ...

June 26, 2012
Read more