Overfueling issue

[gambler87]

I just got my motor running in my 96 Gtp. And I'm getting a rotten egg smell from the exhaust. The cat only has 80k on it. I'm wondering what might cause the issue.

 

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[Nas Escobar]

Might need a tune up, or new o2 sensors. Also, are your gaskets good? I've heard the same smell can come from a bad gasket causing fluids to mix.

 

I would recommend cleaning out the injectors. You can do that with a fuel additive.