My car runs great . . . everything has been fixed and new parts abound. After driving the car for a while, when I shut it down in the garage with the door closed, it kinda stinks. Like old eggs or something. I have a NO2 sensor in the garage and it doesn't trip. Any ideas, or is this one of those "its an m20 - they just do that" situations.
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Your cat is going on you. -
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it's cause i took a shit in the trunk when you werent looking.
srsly tho. it's the cat, you need to replace itMuch wow
I hate 4 doors
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Where would I look for mold? Around the exhaust? The interior smells fine. It's after the car has run, and the smell is on the outside.
Could be the CAT - I did run it for a while with it crazy rich. Any way to test a CAT without going to a smog place?Comment
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you have too much sulfur buildup in the cat. that's why it smells like rotten eggs.Much wow
I hate 4 doors
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my friend had a old firebird and the battery was old as time and after he ran it for a while it started giving the old rotten egg smell so maybe the battery?sigpic
93 325i 120k
mods: straight pipe,eibach sport springs,style 54s,kamotors carbonfiber cai,
future mods: chip, m3 cams, headers, turboComment
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Get yourself an IR thermometer and measure the cat temp when the car is running and fully hot. If the temp is below 400F then the cat is toasted. A good working cat should run at least 500F.Comment
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Where are you measuring the temp? On the heat shield?Originally posted by dnguyen1963 View PostComment
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No, the heat shield will measure only @ 300F. Try to measure the actual cat.Comment
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I swapped out my O2 sensor with a newer one I had (few thousand miles on it, run rich and built up a lot of carbon), and the stink is much lower. Barely noticeable. I'll just see how she does come smog time, and if it doesn't pass worry about the CAT then.Comment
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