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Magnaflow issue

This is a discussion on Magnaflow issue within the Firebird / WS6 forums, part of the Vehicle Specific category; So there is this pinging noise in the right cat. It only acts up at 2,000 rpms. Its starting to ...

  1. #1

    Magnaflow issue

    So there is this pinging noise in the right cat. It only acts up at 2,000 rpms. Its starting to annoy me so I have decided to gut the cats, seeing as how that may be the only way to get rid of it. My question is will that effect the performance of the car to the point that I will need a tune?

  2. #2
    Member c5z28's Avatar
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    No, sounds like the cat internals became loose if it is making a rattle noise.

  3. #3
    Quote Originally Posted by c5z28 View Post
    No, sounds like the cat internals became loose if it is making a rattle noise.
    So what would be the best way to fix this? I would like to avoid paying 4 bills for new cats lol

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    Member sjgreen6's Avatar
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    If your cat is bad take it to the dealer first. GM has extended the warranty on cats for the F bodies. You may be able to get it replaced for free.

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    Smiles for 9.5 Years cammed goat's Avatar
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    Do you have Magnaflow cats on the car? Or are you going to upgrade from stock to Magnaflow cats? Also, do you have heat shields on the cats?

  6. #6
    Quote Originally Posted by cammed goat View Post
    Do you have Magnaflow cats on the car? Or are you going to upgrade from stock to Magnaflow cats? Also, do you have heat shields on the cats?
    Yes I have mag cats, and heat sheilds.

  7. #7
    Smiles for 9.5 Years cammed goat's Avatar
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    Check to see if the shields are rattling. If the shields are OK, then either gut the cats or replace. You should have a warranty on those cats. I can't remember what the warranty is on Magnaflows at the moment.

  8. #8
    Quote Originally Posted by cammed goat View Post
    Check to see if the shields are rattling. If the shields are OK, then either gut the cats or replace. You should have a warranty on those cats. I can't remember what the warranty is on Magnaflows at the moment.
    Yeah but I bought the car with the cats already on them..

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    Smiles for 9.5 Years cammed goat's Avatar
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    Awww...s***!!! Try eBay if you need new cats. Could be cheaper. Ya never know.

  10. #10
    Quote Originally Posted by cammed goat View Post
    Awww...s***!!! Try eBay if you need new cats. Could be cheaper. Ya never know.
    I am hoping its something easy, or maybe something will just "give out" lol

    thx for the help

  11. #11
    Smiles for 9.5 Years cammed goat's Avatar
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    Quote Originally Posted by Mike0202 View Post
    I am hoping its something easy, or maybe something will just "give out" lol

    thx for the help
    No prob. You can try gutting the cats, but you might get a check engine code. But I could be wrong.

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    Member transamgirl89's Avatar
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    Quote Originally Posted by cammed goat View Post
    No prob. You can try gutting the cats, but you might get a check engine code. But I could be wrong.
    Just keep in mind if you gut the cats any shop can refuse to work on it cause apparently removing them is illegal. I had the shop I normally go to tell me that after I dumped my cats. It's bull crap but they can do it. Hopefully it's just your heat shield. I had a dump truck sling one of his mud flaps at me and it went under my car and knocked my heat shield loose. Easy fix if that's all it is.

  13. #13
    Smiles for 9.5 Years cammed goat's Avatar
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    Quote Originally Posted by transamgirl89 View Post
    Just keep in mind if you gut the cats any shop can refuse to work on it cause apparently removing them is illegal. I had the shop I normally go to tell me that after I dumped my cats. It's bull crap but they can do it. Hopefully it's just your heat shield. I had a dump truck sling one of his mud flaps at me and it went under my car and knocked my heat shield loose. Easy fix if that's all it is.
    Oh yeah. I know that. When the cat on my last car went and I bought a Magnaflow stainless cat, there was a card in the box that the shop had to fill out as a reason for replacement. It's against federal law to tamper with functioning cats.

  14. #14
    Quote Originally Posted by transamgirl89 View Post
    Just keep in mind if you gut the cats any shop can refuse to work on it cause apparently removing them is illegal. I had the shop I normally go to tell me that after I dumped my cats. It's bull crap but they can do it. Hopefully it's just your heat shield. I had a dump truck sling one of his mud flaps at me and it went under my car and knocked my heat shield loose. Easy fix if that's all it is.
    From what I have read this is very common w/mf catback

  15. #15
    Actually guys they are the stock cats. I have magnaflow catback on the car. So maybe the dealer would help me out?

  16. #16
    Junior Member KITT#42's Avatar
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    I would go to the Dealer. Free is always good.

  17. #17
    Im actaully getting thunderbolt high flow cats installed tomorrow. Hopefully they wont be too much louder.

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    Member sjgreen6's Avatar
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    So go to the dealer first, get the cats replaced under warranty then swap to the Thunderbolts and if you have a problem later you'll still have a good set of stock cats to switch back to later.

  19. #19
    Well thunderboltz are on. Sounds the same as stock :/

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