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2004 GTP Comp G Exhaust Smells bad

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daltman360

New member
Today i noticed that my exhaust smells bad like rotten eggs. What looking what in can do to fix it. Looked online and it say a multiple of things, Conveter, o2 sensor, maf sensor, etc... Was hoping if anyone knows this issue and knows how to fix..

PS.... this is supercharged so i run premium gas in it all the time
 


has there been a new cat installed ?? mine did for a wile right after puting a new cat in
 


Your cat's got an hairball, replace it. Yes you need to get its tail and head welded. Make sure to skin both ends nicely.
 
Ok so found a downpipe off road 2.5 with o2 bung. Is this too loud to run on streets and does the o2 sensor simply plug into the bung with no error codes?
 


daltman360 said:
So i would have to flash the pcm?
Click to expand...

No.. Go to the parts store and find a 2 pack of spark plug non foulers(they are like $5). You need to drill a hole in one(believe its a 1/2 in drill bit) and leave the other as is. Screw your o2 sensor into the one you drilled a hole through, then screw that one into the untouched one. Put that into the o2 bung and you should be good. Basicly it limits the ammount of exhaust that can hit the o2 sensor simulating you actually having one.
 


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