1973Guppie
Supporting Vendor
- Joined
- Jan 31, 2003
- Threads
- 952
- Messages
- 10,227
- Location
- "the whale's vagina", CA
- Website
- www.noahsarkstlc.com
Hi All,
For the past several months I have been getting a metallic rattling noise upon acceleration in my 96 80 series. I went under there today and am fairly sure it is the cats that are making the noise. I recenlty had the vehicle smogged and it passed just fine but the noise is driving me crazy. I recently had the muffler replaced as the baffles came apart inside and were blocking and causing major noise. The muffler I have is a POS and I want to replace it. Won't ever go to MIDAS again. The cats are fairly rusted, and they are flaking off quite a bit. I went under there with a rubber mallet and when I hit the cats I get a loose rattling noise for sure that sounds similar to what I hear upon acceleration. The good news is that the pipe from the engine seems in good shape. I am thinking I am going to have to replace the cats.
Question: what are the telltale signs of a cat going out? have others had rattling issues when their cats go bad? I am thinking it is rusting inside that is basically coming apart and rattling. This happened with my muffler as well.
Question: what are the options out there for high flows cats? I know there are vendors on this site but unfortunately I live in CA and it has to be CARB approved for CA for me to buy it. (nazi's here). Does anyone make a high flow performance cat for the 80 series? I know I can get OEM but really don't want to spend that much.
thanks!
Noah
For the past several months I have been getting a metallic rattling noise upon acceleration in my 96 80 series. I went under there today and am fairly sure it is the cats that are making the noise. I recenlty had the vehicle smogged and it passed just fine but the noise is driving me crazy. I recently had the muffler replaced as the baffles came apart inside and were blocking and causing major noise. The muffler I have is a POS and I want to replace it. Won't ever go to MIDAS again. The cats are fairly rusted, and they are flaking off quite a bit. I went under there with a rubber mallet and when I hit the cats I get a loose rattling noise for sure that sounds similar to what I hear upon acceleration. The good news is that the pipe from the engine seems in good shape. I am thinking I am going to have to replace the cats.
Question: what are the telltale signs of a cat going out? have others had rattling issues when their cats go bad? I am thinking it is rusting inside that is basically coming apart and rattling. This happened with my muffler as well.
Question: what are the options out there for high flows cats? I know there are vendors on this site but unfortunately I live in CA and it has to be CARB approved for CA for me to buy it. (nazi's here). Does anyone make a high flow performance cat for the 80 series? I know I can get OEM but really don't want to spend that much.
thanks!
Noah