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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 09-28-2004, 03:18 PM   #1 (permalink)
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I am have a 92 325i and I have now burned up my second cat in as many months. I believe the car might be run rich and causeing this problem. I have replaced the O2 sensor the last time I replace that cat. which was all of three weeks ago. Now I am just tiered of wasting the money. I plan to run a small muffler or resonator in place of were the stock goes. Does anyone have any different ideas or input on my problem.
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Old 09-29-2004, 10:13 AM   #2 (permalink)
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theres 2 kinds of cats one with a trillion beads packed inside of it and one that has alot of tunnels. which one are u running?
downside: in running without a cat is SMOG. and u will smell a hint co2 while driving. and you will smell alot if ur inside a garage.
upside: it will sound like a beast
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Old 09-29-2004, 11:03 AM   #3 (permalink)
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Pro: You pass emissions...
Con: they hinder preformance a little bit, ESP if you have the beady one. The honeycomb kind isn't that bad.
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Old 09-29-2004, 07:40 PM   #4 (permalink)
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yeah pretty much if you live in a state that tests emmisions tahts the pro i see, not getting a huge ass ticket when you fail emmisions!

David
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Old 09-30-2004, 02:01 AM   #5 (permalink)
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Quote:
Originally posted by vincentwashere@Sep 29 2004, 09:13 AM

downside: in running without a cat is SMOG. and u will smell a hint co2 while driving. and you will smell alot if ur inside a garage.

[snapback]201335[/snapback]
Ummm...

CO2 is odorless man, that is why it is such a deadly killer.

Did you mean you might smell gasoline?
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Old 09-30-2004, 12:46 PM   #6 (permalink)
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you're smelling hydrocarbons. it's nastay! get a universal cat from Catco or something and save yourself a ton of money. but before you do that, find out why you're burning them up. check your injectors to see if they haven't failed (leaking? not spraying?) and check your airflow meter to see that it's functioning properly. I'm new to Bimmers, so this is uncharted territory for me...but fuel injection is the same principle across the board. start troubleshooting!

Eric
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Old 09-30-2004, 08:03 PM   #7 (permalink)
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carbon monoxide is what u smell
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Old 09-30-2004, 08:45 PM   #8 (permalink)
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yes.. it's CO, not CO2... carbonMONoxide, carbonDIoxide.


If you remove the cat, the back of your car may get black like all of those ricers with the fart cannons....
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Old 09-30-2004, 09:05 PM   #9 (permalink)
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Quote:
Originally posted by bitcore@Sep 30 2004, 06:45 PM
black like all of those ricers with the fart cannons....
[snapback]202451[/snapback]


Sorry that just made me laugh...
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Old 09-30-2004, 11:21 PM   #10 (permalink)
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i took out the Cat on my car a month ago and it made a huge difference, you do smell unburned hydrocarbons, but the sound is addictive. I haven't had much of a problem with soot, just noticed the inside of my tip get a bit darker.
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