Magnaflow issue

**Mike0202** · 03-12-2010, 04:31 PM

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?

**c5z28** · 03-12-2010, 04:41 PM

No, sounds like the cat internals became loose if it is making a rattle noise.

**Mike0202** · 03-12-2010, 04:54 PM

Originally Posted by c5z28

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

**sjgreen6** · 03-12-2010, 04:56 PM

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.

**cammed goat** · 03-12-2010, 04:57 PM

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?

**Mike0202** · 03-12-2010, 05:52 PM

Originally Posted by cammed goat

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.

**cammed goat** · 03-12-2010, 05:56 PM

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.

**Mike0202** · 03-12-2010, 05:58 PM

Originally Posted by cammed goat

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..

**cammed goat** · 03-12-2010, 06:02 PM

Awww...s***!!! Try eBay if you need new cats. Could be cheaper. Ya never know.

**Mike0202** · 03-12-2010, 06:24 PM

Originally Posted by cammed goat

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

**cammed goat** · 03-12-2010, 06:28 PM

Originally Posted by Mike0202

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.

**transamgirl89** · 03-12-2010, 06:43 PM

Originally Posted by cammed goat

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.

**cammed goat** · 03-12-2010, 06:51 PM

Originally Posted by transamgirl89

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.

**Mike0202** · 03-12-2010, 07:24 PM

Originally Posted by transamgirl89

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

**Mike0202** · 03-15-2010, 09:47 PM

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

**KITT#42** · 03-16-2010, 03:11 PM

I would go to the Dealer. Free is always good.

**Mike0202** · 03-17-2010, 08:29 AM

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

**sjgreen6** · 03-19-2010, 05:52 AM

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.