u just proved it yourself
The catalytic converter consists of small amounts of precious metal
deposited on a ceramic substrate. The failure mode is chemical ie
poisoning the precious metal with contminants like lead in gas or
mechanical, breaking up the ceramic substrate. Plugging is mechanical
failure (the ceramic substrate gets broken up into small fine pieces)
normal thermal cycling will eventually cause the ceramic to start to
crumble. Cats are designed to last 100k miles minimum but if the car
is driven only on short trips (every trip thermal cycles the cat) then
early failure could result.
Second, thermal shock will cause the ceramic to break up. Having the
car (and cat) up to operating temperature and driving thru deep water
for a long enough period will cause a thermal shock that could cause
Unlike the earlier two-way converters that could perform their job
relatively efficiently with a lean fuel mixture, the catalyst inside a
three-way converter that reduces NOX requires a rich fuel mixture. But
a rich fuel mixture increases CO levels in the exhaust. So to reduce
all three pollutants (HC, CO and NOX), a three-way converter requires
a fuel mixture that constantly changes or flip flops back and forth
from rich to lean. This, in turn, requires feedback carburetion or
electronic fuel injection, plus an oxygen sensor in the exhaust to
keep tabs on whats happening with the fuel mixture.
Converters may also fail if they get too hot. This can be caused by
unburned fuel in the exhaust. Contributing factors include a rich fuel
mixture, ignition misfire (a fouled spark plug or bad plug wire) or a
burned exhaust valve that leaks compression. Fuel in the exhaust has
the same effect as dumping gasoline on a bed of glowing embers. Things
get real hot real fast. If the converters temperature climbs high
enough, it can melt the ceramic substrate that supports the catalyst
causing a partial or complete blockage inside. This increases
backpressure, preventing the engine from exhaling and robbing it of
power. Fuel consumption may shoot up and the engine may feel sluggish
at higher speeds. Or, if the converter is completely plugged, the
engine may stall after starting and not restart.
now lets see
i bet you get a rich condition
coverter makes heat
engine is more loaded
condition gets richer
hey pick nose
yor failed yeat too
no canada for you
Show me a 1966 vehicle with a catalytic converter. I've never seen one. I doubt
your old enough to know what a 1966 vehicle no less a Ford FE engine looks like.
Look at the above text, where do you see a cat converter mentioned?
BTW, I did not have the "most vivid recollection", that was Tom Adkins. Now why
is a restricted exhaust going to cause an engine over heat? Explain how a oxygen
starved fire can make ample heat to damage an engine? I want to know the answer.
Explain how the engine cooling system does not come into play. Explain how you
can get enough oxygen into a cylinder that is already full of an inert gas to
excite combustion. What part of science explains that?
u better find out how a cat works
but then this is second year stuff
and u have no certification
coverter is hot
fuel condition are rich
add air from the air pump
put another log on the fire
Plugged exhaust, very low O2, cold flame. Tell you what. While you are sitting
in front of your air tight. Put a thermometer in the fire and close the flue.
Let us all know how the fire handles the lack of oxygen.
The cat needs one important element in order to release this "great amount
of heat".... care to tell us what it is? Care to tell us how it gets there
if the exhaust is plugged?
OOOOOHHH.... you're losing control of it.... open mouth - insert foot is
happening every post....
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