I know, another y-pipe post.... well i been away for a while military deployment... my check engine light is coming on and it looks like one of my pre cats is going bad. I was wonderind what are the different brands of y-pipe and prices. im not looking to spend a lot, but anything is better than the 750 from the dealer. what do yall recommend ?
thanks

 

Exactly what code did you get first? You said one of your pre-cats is bad, so I assume you are Cali spec. If it is your front pre-cat that is bad, getting a new y-pipe will NOT fix that problem because that pre-cat is not in the y-pipe. Only if your rear pre-cat is bad will you be able to solve the problem via a y-pipe replacement.

 

If your front pre-cat is bad, then you could replace it with a new one, or a used Fed spec header (they don't have a cat in them), or Cattman or HotShot headers...

 

if you are getting a p0430/0420 that could either be precats or secondary oxegen simulator. you can get a O2 similaltor for $30 that will take care of the code

 

IMO, if your headers-precat has really gone bad (collapsed) then I would replace it as engine may suck in debris from it and damage its internals...

 

I agree that while it may be a good short term fix to get rid of the codes, rattling pre-cat parts isn't something you want to be driving around with in the long term.

 

I think it is a p0430, i will have to go back in the past threads and find it

 

yes it is a p0430 its on page 55 of the threads here is the link

http://www.forums.maxima.org/showthread.php?t=442451

my car is Cali spec

 

bump???????????????

 

You could try replacing the O2 sensor first or an O2 sim. If you want to replace the pre-cat, you can usually find em for sale in the FS forums. I know DCMan is selling the front pre-cat off a DE-K for 85 shipped right now.