Tip & How-To about Mercedes-Benz E-Class
A review of engine operation:
In order to function properly an engine requires mechanical integrity along with a combination of air, fuel and a well timed spark. Engine operation is governed by an Electronic (Power) Control Unit/Module (ECU/ECM/PCM)or Engine Management System (EMS) that receives signals from a variety of sensors and in turn supplies air, fuel and timing appropriately. To reduce the impact of engine emissions on the environment the ECU also operates a number of emission control actuators and these too are monitored by sensors
Fault diagnosis can be helped by viewing the engine in several states: (i) starting;(ii) warming up or 'open cycle'; and (iii) as running at normal operational temperatures or 'closed cycle'. Most errors, and frequently the most inconvenient, relate to the start, or rather, failing to start process, closely followed by an engine that otherwise behaves normally but shuts down with little warning. When sensor signals indicating conditions outside normal operational parameters are sent to the ECU, the respective errors codes (DTCs Diagnostic trouble codes) are recordedand the 'check engine light' (CEL) or 'malfunction indicator light' (MIL) is illuminated on the dash board. Reading these error codes indicates the system in error and helps diagnose the fault.
The sensors and actuators included in this general guide are an amalgam of the ones found on many of today's cars.This is not to say that every car will have the full set of sensors or the exact layout as discussed here. Cars vary from manufacturer to manufacturer and technical developments also occur over time introducing new sensors whilst making older ones obsolete. NEXT 1) Air: From atmosphere to engine
Posted by Joseph... on
Aug 09, 2014 | 2005 GMC Canyon
Jul 16, 2014 | Kia Sportage Cars & Trucks
far as the review says the mileage should not falter since it is new as you said.
are the causes of a poor mileage in a car:-
Inflated Car Tires
tires that are improperly inflated create significant road resistance and drag
on a moving car. A car engine has to work harder to propel a car forward due to
this increased tire/road resistance. This resistance chips away at a car's gas
dirty air filter impedes air flow into a car's engine, a process that disrupts
normal engine combustion and makes it less efficient. This causes a reduction
in both engine performance and gas mileage.
plugs are responsible for igniting a car's air/fuel mixture, an event that
causes a mini explosion inside a car's engine cylinders. Bad or dysfunctional
spark plugs don't fire, or ignite, properly; thus, they affect engine
combustion negatively, which in turn negatively affects gas mileage.
a car to be at its most fuel efficient, its oxygen sensors, small and
electronically operated, automatically adjust a car's air/fuel mixture and have
to be functioning properly. Bad oxygen sensors cause abnormal air/fuel mixture
ratios, a condition that results in poor gas mileage and poor vehicle
car's fuel injection system is responsible for injecting precise amounts of
fuel into a car's engine cylinders, where it is combined with air and ignited.
For a car to perform properly, a specific amount of fuel has to be injected by
each fuel injector into each engine cylinder. A leaky fuel injector wastes fuel
by leaking it outside the engine and reducing the amount of fuel that makes it
into the engine. This results in wasted fuel and reduced gas mileage.
It is suggested to start with a code scanner to find out if there are any stored fault codes in your car.
check this link for some helpful tips:-
get back to us if you have further query else please accept the suggestion.
Thank you for contacting fixya.com
Jul 18, 2011 | Ford Fiesta Cars & Trucks
Sep 15, 2009 | 2002 Chrysler Town & Country
1,030 people viewed this tip
Usually answered in minutes!