So you think you're going to impress her by picking her up in your BMW, huh? Unfortunately, your car's exhaust smells like Riker's Island on taco night. What's going on, and why is your car going to ruin your date? Three simple words: BMW Catalytic Converter. We've all smelled the number one symptom from a failed catalytic converter: a strong, sulfurous, rotten-egg odor. What you may not have notices are the more subtle symptoms of a BMW catalytic converter problem. Things like poor fuel economy, a decrease in power, and stumbling on acceleration usually precede the foul smell, but they can be mild enough to escape detection.
Your BMW catalytic converter is installed in the exhaust system, and
looks a lot like a little muffler except that it's usually close to the
engine. That's because the catalytic converter needs lots of heat to do
its job, and the exhaust gasses are hotter closer to their origin. And
in most states, if your catalytic converter fails, you're not going to
be able to ignore it for long: Your car won't come close to passing an
emissions inspection with a plugged cat. So if your car starts signaling
that it's BMW catalytic converter is shot, get it fixed: It'll help your
performance, and your dating life.
Root causes of this problem are a malfunctioning O2 sensor, plugged or
inoperable fuel injectors, piston blow-by, leaking head gasket, broken
or frozen choke or carburetor float, excessive cranking time, and repeated
incidences of running out of gas.
Automotive Catalytic converter failure will typically fall into 4 categories:
1. overheated converter
2. Plugged Insides
3. Thermal shock or breakage
4. damaged or bent system
converter failure is most often caused when excessive raw fuel comes
into contact with the catalyst,
and "burns" in the vehicles converter instead of in the cars
motor. The high quantity of fuel generates very high temperatures well
in excess what of the converter was ment to handle, this thus causing
meltdown of the ceramic guts or insides of the cars converter. The melted
ceramic insides will then block the converters exhaust path. Sometimes
you can hear a whisle sound when revving up the cars engine. This usually
indicates a clogged catalytic converter.