Snypa

iTrader: (35)

1. Ok, so i shot 2 sets of codes last 2-3 weeks.First was a p0158(bought new o2 sensor, bank2 sensor2) then p0156(didnt buy shieet).took it to the mechanic after installing the sensor and he told me that the cat seems to be deteriorating hence not holding pressure and also not keeping in the exhaust long enough in order for the o2sensors to give correct/precise reading. Can you guys really tell me if this makes sense.

2. On the other hand, his "fix" for this problem is for me to buy a new cat-converter and this should fix all lights and make the o2sensors "read" correctly.If this is really so,how do i go about looking a new cat.?
Will any cat do the job, or do you guys recommend something...maybe something that would increase power or performance in vehicle.

HondaKiller718

For me it makes no sense. The cat converter has nothing to do with holding pressure. I would find another shop to go to. Get a few opinions. The purpose of the cat is to reduce harmful emmisions not holding pressure. Sounds like the magical unicorn is poking holes in your cat again. please read how they work and come to your own conclusions. http://auto.howstuffworks.com/catalytic-converter.htm

Snypa

iTrader: (35)

thanx alot.

Snypa

iTrader: (35)

ok, so can the catalytic converter deteriorate.? Can it cause the car to be throwing codes? If so what could the problem be. I hcanged the bank2 sensor 2 and light came back. the last light i got was P0156.
Any help would be appreciated.

pmohr

iTrader: (26)

Have you pulled it down to see how it looks, if it's blown out?

Snypa

iTrader: (35)

dont have tools or anything to do that. never gon that far in pulling stuff.

NmexMAX

iTrader: (22)

Yes it can deteriorate, yes it can cause CEL codes. So, with that said, you have some options, take it off and inspect, have someone else do it (shop etc, $$$).

Snypa

iTrader: (35)

ok...thanx for responding. So im kinda preparing for the worst.If i happen to need a new cat, how much would it run.? Are those ebay cats worth buying. what would you guys buy?

max ride 41

iTrader: (4)

find a shop thats willing to put on outside parts, ie, warpspeed, cattman, stillen, might as well replace the y-pipe with it for what they're gonna charge for just the cat. i got the warpspeed y-pipe with cat for 285.00 shipped, and i know it gonna run me another 200.00 or so for install. waiting on install until the nicer weather rolls around so the salt and crap does'nt eat away at it.

NmexMAX

iTrader: (22)

Buy a cat from the aforementioned vendors, take it to a shop, have them install it, save $$ over the dealer.

max ride 41

iTrader: (4)

^^^^^ gee, i would've never thought of that......

NmexMAX

iTrader: (22)

There are a lot of people on here that lack the talent you have, which is typically referred to as common sense. Now, don’t ***** when I don’t spoonfeed ok?

Snypa

iTrader: (35)

thanx for the help asszhole

Snypa

iTrader: (35)

thanx alot. i think i might start looking out for some of the mentioned vendors.

Snypa

iTrader: (35)

Thanx alot for the assistant guys. Another thing, is there a sensor in or near the cat converter.?

max ride 41

iTrader: (4)

first off, i don't appreciate being threatened pmohr, its not being a smartass. its called reading the thread before you post up a similar response. i see it all the time, and its a little annoying, backing up someone's opinion is another thing all together. and i do know the difference, you seem to be on the defensive alot in here, ive been in here 2 years now, and i know the rules. relax, its only a car forum not the end of the world if someone is sarcastic once in awhile or types something you might not like to read.

Blackwind

iTrader: (9)

nope just the one in the B-pipe. doing the cat is actualy really easy. provided its not rusted on.

pmohr

iTrader: (26)

Depends on what year he is. 95-96 have an O2 directly in the cat.

Blackwind

iTrader: (9)

:

pmohr

iTrader: (26)

That was stated in this thread where? I wasn't aware of the year of his car.

Regardless, my information is still accurate.

Blackwind

iTrader: (9)

thats why i edited my post.

Snypa

iTrader: (35)

yeah, sorry guys, the car is a 99 SE.

Snypa

iTrader: (35)

old post gets a bump....my cat is making my car shoot codes like an ***....still.need a replacement cat........new ones would be good.

KRRZ350

iTrader: (29)

Cali or fed spec? Got exact code #'s for us? FYI I've only see one bad cat out of a handful of cat codes that were caused by faulty o2's that didn't trip o2 codes, take a look at it like pmohr said, and pul the o2 sensors out and shake them, listen for a broken off tip. There are other tests that a compotent emmisions tech can perform as well, I don't think your mechanic falls under that catagory, did he take a look at your fuel trims, or inlet and outlet temps? Or did he just say "Yeah, I'm pretty sure that code is from a bad cat because it seems to be deteriorating"

Why don't you take it to an org member, I could easily name a few from the florida area that really know there siht, Nismology does work on the side

Also, hi-flow cat's suck *****. seeing as he's a PW, '99blackmaxms will surely stumble upon this thread and comment about how last night we had to rip his 3-month old warpspeed out yesterday because the honeycomb just decided to come loose and rattle around, actually today I was looking at it and the brick that came loose could tilt sideways, lol, yeah honeycomb sideways is REAL high flow.............

Snypa

iTrader: (35)

thanx for replying....its actually a cali spec.the codes i am shooting now is a p0158 and p0159...yeah thats about it.what happen was that it was shooting the bank 2 sensor 2 code(dont remember it) and then i got a new sensor from advance and took it to him got it done with some other tune-ups/change trans fluid.all lights were gone after resetting as usual.about a month later,if so long,light came back on,got these two codes.took it to him and he placed it on the comp pulled codes and was doing his thing(got wire diagram and all to prove that he did change it,cause i didnt really beleive,and show me that this plug looked newer than the rest), after a while he told me"its def the cat converter man".......im like...wtf. anyhow i didnt see him do any shaking of the sensor nor did he do any fuel trims or out/in temp.i asked if this could have been it all the time, he said yes, but the way it triggers, any human would of changed the sensor first.right now guys, i have no clue wtf to do.i would be pissed if i got a new cat,codes go and then come back in a week....even in a month i would be still upset.shed some light.

Snypa

iTrader: (35)

ok.so just out of curiousty,i called a local nissan stealership to find out how much a cat converter would cost.......$1028.00....wtf..there is no way i can/would buy this item AT ALL.you gotta help me out guys,my gas mileage sucks *** and i really need to find out what the prob is and get this light off.thanx.

NmexMAX

iTrader: (22)

The light has been shed, do your own work, or find a local orger.

Snypa

iTrader: (35)

ok is anyone near pembroke pines/ft lauderdale area that has tools and would be able to help me with this situation>?