Englewood drivers realize it is pretty amazing how auto makers have
been able to consistently build more powerful engines in vehicles
that get better fuel economy while at the same meeting increasing
environmental standards. One of the little miracles that helps make
this happen is the Exhaust Gas Recirculation (EGR) Valve. The EGR
valve routes some exhaust back into the air intake system in both
gasoline and diesel engines. The exhaust gas takes up some space in
the engine cylinders, replacing some of the oxygen-rich air that
would otherwise be in there. This means that the fuel burning event
is cooler. Cooler combustion means fewer harmful nitrous oxides are
Your EGR valve can get gummed up, messing up the timing and amount
of exhaust that is supposed to be recirculated in the engine. Symptoms of EGR valve problems are rough idle and poor engine
performance. Performance can be restored by cleaning or replacing
the EGR valve, depending on how dirty it is.
EGR valves in diesel engines are particularly susceptible to
becoming clogged because of the high soot content in diesel exhaust.
[Note: the soot is ultimately filtered out of the exhaust further
down the exhaust system, but not before it passes through the EGR
There are a couple of things you can do to lengthen the life of the
EGR valve in your diesel engine. First, extended idling allows for
more soot buildup because the engine operating temperature is
reduced as it idles; the valve is not opening and closing, allowing
particulates to accumulate in the valve. Next is fuel quality.
Diesel fuel has a cetane rating: the higher the rating, the better
the combustion will be. Unfortunately, the cetane rating is rarely
posted on the pump and can vary from location to location. Adding a
cetane booster to the fuel tank can help with this.
So, if you are experiencing rough idling or poor performance in your
gas or diesel vehicle, have one of our Xpertech Auto Repair Inc.
expert technicians diagnose the problem. They can set things right
and restore your vehicle’s performance.
Xpertech Auto Repair Inc.
101 N McCall Road
Englewood, Florida 34223