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ECUsThe worse place in the
world that you could put a sophisticated piece of electronics is under
the bonnet of a car due to massive vibration, constant heat variations
and intense radio interference from the ignition system added to the
fact that the manufacturers must produce on a huge scale, this causes so
many problems and design flaws with modern day ECUs.
With advanced age, a
failing ECU can cause seemingly random starting and driveability faults.
For example, a vehicle may refuse to start when cranked with the starter
motor, but may respond easily to a push start.
What is an ECU?
The
ECU (Engine Control Unit) is a computer that runs the engine in all
modern day vehicles, Introduced in the early 1980s with the advent of
electronic fuel injection systems, these early systems where very
primitive they just monitored the revolution of the engine, air flow in
to the engine and engine temperature. The ECU then used this information
gathered from these sensors to inject the right amount of fuel at the
right time. The advantages of fuel injection over a carburettor engine
was the degree of control that a computer had over fuel delivery, 1000s
of times more accurate than that of a carborator.
In the present day an ECU is a very powerful control system capable of
gathering hundreds of channels of information to control every aspect of
the engine, even its own efficiency.
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