The Y pipe eventually cracks just below the upper flanges around the weld and also at the Y itself. If you suspect any exhaust leaks or inspect to see the condition of your pipes you may be able to determine their condition.

The point being it may be easier to just get the whole Y pipe with cats and make the swap now rather than later.

There are several options available.

 

that is what I did, replaced the whole exhaust with a stainless magnaflow from the manifolds back. Was pricey, but easier than dealing with stuck sensors and a blowing box

 

Magnaflow makes a ss D2 Y pipe with cats??

 

Yes, their entire system has the cats too. The only thing I am not happy about it is that it looks rusty now after three years. I expected SS to stay shiny.

*EDIT*

I went looking and I do not see a full system sold anymore. You can still buy the SS cats from magniflow, but not as part of the full exhaust. It could be old age creeping up on me, but I thought I bought it as one piece, but I could be wrong.

 

SO, i ended up replacing the pug wires (plugs are still somewhat new, put em in in march) AND one of the coil packs (because i could only afford 1 at the time i bought it a month and a half ago) and no change in how it runs, if anything maybe runs worse! Like i said, i have a bluetooth cheap scanner, and the codes are as follows: P1481, P1300, P0303, P0300, P0307, P0152, P0135, P0155. Is there anyone out that has had the same codes and/or issues? Could a bad O2 sensor (because i couldnt get it out and dont quite have the tools and funds to be able to at the moment) be a root cause of this? Im stumped and frankly getting fed up with it. Any ideas?

 

I will also try to attach a video to try to demonstrate what it sounds like and is doing.

 

Update to the previous: I kinda figured out the O2 sensor issue by cheating a little by plugging a new one in and letting it hang there JUST to see if the current one is the main issue. It cleared up the O2 codes, but I still had misfire codes on 3 and 7 cylinders. I went and replaced #3 and #7 spark plugs, which were only 3 months old but they looked HORRIBLE and replaced them with an iridium plug and BRIEFLY got rid of the cylinder 7 misfire if only for about 3 minutes and then it started missing again. I wasn't able to get rid of cylinder 3 misfire, and I cannot upload a video for an example of what's happening.