35thsickz33

iTrader: (2)

hi im new to forums i got a 350z vortech its tuned on the ss box for my headers borla exhaust 5/16 spacer and on stock cats . My driver side cat is going bad i think . im getting a cel every day if im going easy on it i check the code and couple people told me its the coverter going bad if i rember correctly its the p0430 . So im just going to purchase hfc cats 200 cell my question is i wont be able to retune for a couple months !! how necassary is a retune for hfc over stock cats ?? i know for sure you need one for tp's thanks for the help and sorry for the noob questions just want my z to last

OldManZ350

iTrader: (23)

What Motor?

What is all of your Setup? Boost? Serp and Cog Pulleys?

Who did the Tuning?

What's your Tune look like Now? AFR's? Ignition Timing? Ect?

What Octane?

Going from stocks cats to Hi Flow Cats will not change the tune much at all, but it will a small amount. If your tune is on the rich side, you will be fine.

Also an Exhaust Leak could cause codes.

What happens when you delete the code?

35thsickz33

iTrader: (2)

its a non rev up .pulleys cog and belts are what came with the kit from vortech havent changed anything with that i think i was pushing around 6-7psi . I got it tuned at a private shop in austin texas on 91 octane ... i delete the code and it comes back either when i start it up cold and drive about 5-10mins then i delete and usaul come back on after i drive a while or take it real easy on it barely started couple hundred miles ago i get it around once a day at least i keep a scaner in my car to reset. my car still pulls hard exhaust doesnt sound like a leak im getting a a/f guage installed when i put the hfc's on .. and thanks for your help

35thsickz33

iTrader: (2)

i checked my exhaust from the rear all the way to the headers i dont see or here any leaks . So you think i should go threw with the hfc's ?? also my car only has 60k on it i heard that nissan covers the cats up to 80k . I dont know if they would cover mine since im supercharged . I just dont want to buy the hfc's then the problem doesnt fix i hate having cel and i dont want the cat to clog the exhaust if its going bad.

OldManZ350

iTrader: (23)

If its still under warranty, the Dealer should fix it.

I've never had a problem with my dealer because of my modification.

Triji

iTrader: (2)

"Magnuson moss warranty act"

They must prove that your modification was the cause of the failure (Not just say it did), if they can not do that then they must warranty the part.

On another note, I never threw a code while I had my test pipes on or with my stock cats after I took the TP's off through 101,000 miles. Hell, even with friggn rod knock I wasn't throwing any codes or had a check engine light come on (lol) .... My girl was a tough biatch and just wanted to keep running and stretch her legs.

35thsickz33

iTrader: (2)

It was the driver side cat i removed them today and it was comletly empty threw some hfc in drove 100miles and no cel so far

bmyles

So you're saying your stock cats were completely gutted out and you had no idea?

35thsickz33

iTrader: (2)

just the driver side everything was good then all of a sudden i started getting cel light for the driver side and ordered hfc so when i finally installed them i looked in the driver side cat gutted and the passenger side fine lol no change in noise or performance just the cel lol

Resmarted

iTrader: (2)

He's saying the the driver side cat totally blew out.


OP depending on what exhaust you have, that cat may still be in your exhaust. May be worth the trouble to remove.

The driver side usually runs leaner, so maybe it was heat related. My guess is upon hitting fuel cut at some point you shot a bunch of unburnt fuel into the cats and they burned it up and that one blew out.

Hard to say for sure. But the Magnuson Moss act would not cover this. The SS box altered the factory tune which I guarantee you had something to do with this cat going out.

Usually HFC take extra heat and extra fuel better, simply by allowing the exhaust to flow through easier.

OldManZ350

iTrader: (23)

Lots of excess fuel will eat up the cats. But for it to completely gut it, it had to be a ton of fuel. What do your exhaust tips look like? post pic.

I'd check your tune. Many tuners make them way to rich and only tune @ WOT.

If you could get a AFR reading thru Boost and light throttle, I could modify your maps to clean it up some. just need to send me your map and AFR recording.

I've worked with the SplitSecond Box a bunch, and know it pretty well.

35thsickz33

iTrader: (2)

2nd pic is driver side

OldManZ350

iTrader: (23)

Very Rich

35thsickz33

iTrader: (2)

alright everything going good no code then bam today cruising down the highway got a p1283 !!! reset it and came back 75miles later any advice on this ?? I read people say it can be a lot of thing I don't have any vaccum leaks Ill double check the bolts on the hfc make incase ... On the hfc I have the o2 extenders installed but there straight ones that came with them some one also told me put a small amount of steel wool around it .. Im getting a aem wideband this week to see if im leaning out I don't think I am but just incase again only getting it while crusing .. I want a retune but the only tuner in the area wants 500$ for a retune

35thsickz33

iTrader: (2)

also I check the complete exhaust no clogs !!