SES light and High flow cat's

[xms]

Will I get one when I replace my cat with a mor-flow 3" cat

[Bene]

I have it! [img]graemlins/thumbsdown.gif[/img] Replaced my O2 sensors w/ O2 simms and still shows! Its not throwing the same code though.

[Night Rider]

<blockquote>quote:</font><hr>Originally posted by xms:
Will I get one when I replace my cat with a mor-flow 3" cat <hr></blockquote>

Mine comes & goes. I'm gona try closing off the air inlet tube, & replacing my o2 sensors to see if that helps. But you get used to it after awhile :(

[xms]

So I can't replace my cat with a high flow one without getting the light?

[Cale]

Will someone please answer asap! I'm having one put on today and I don't want ti throwing a code, even if it doesnt do anything!!!

[RedbirdV6]

<blockquote>quote:</font><hr>Originally posted by Cale:
Will someone please answer asap! I'm having one put on today and I don't want ti throwing a code, even if it doesnt do anything!!!<hr></blockquote>

Yes you will get a SES light if you replace your stock cat with a high flow one. Your o2's aren''t made to handle that much flow and cannot give a proper reading :D

[Cale]

Arg!! Damnit!! Thanks for the fast response RedBird! I appreciate it.

Just one question though - what can I do so the cat will work?
Ive heard of people using 02 Simms, but will that cure the SES light?

[RedbirdV6]

<blockquote>quote:</font><hr>Originally posted by Cale:
Arg!! Damnit!! Thanks for the fast response RedBird! I appreciate it.

Just one question though - what can I do so the cat will work?
Ive heard of people using 02 Simms, but will that cure the SES light?<hr></blockquote>


I am not sure, I just got my sims in the mail yesterday but I have no cat so I am not sure it will stop the dreaded glow of the SES light. If not I am going to buy a new cat because I cannot stand the light being on :mad: it drives me crazy [img]tongue.gif[/img] but from what I have heard it will go out with the sims

[MidLifeSpeed]

I've had a 3" hi-flow cat on my ride since Feb 01 and have never thrown an SES ! Running with original O2's ... not simms. I know of no reason for the hi-flow cat to throw SES unless maybe the cat doesn't have enough catalyst volume for the flow ...

[RedbirdV6]

<blockquote>quote:</font><hr>Originally posted by MidLifeSpeed:
I've had a 3" hi-flow cat on my ride since Feb 01 and have never thrown an SES ! Running with original O2's ... not simms. I know of no reason for the hi-flow cat to throw SES unless maybe the cat doesn't have enough catalyst volume for the flow ...<hr></blockquote>

90% of the time it will throw a code do to higher flow of exhaust that the o2's can't handle. You may have just got lucky or maybe it will throw it after you said that, did ya knock on some wood after posting :D LOL. Anyway the light doesn't hurt anything it is just annoying as HELL [img]tongue.gif[/img]

[MidLifeSpeed]

yaah ... knock on wood :D

[Deuce Bigs]

just my $.02 the stock cat will flow enough for the V6. you may lose a horse or two from it but you will from any cat. i think the better way to go is get the 3in. to 2.25in. reducer cut off and have a 3" s-pipe put in it's place. i think a high flow cat is a waste of money.

[Magnus]

Deuce, I think it all depends on the setup.

My current setup, NA.. I did track testing.

3" CatCo cat.. 14.8's@87
2.5" Off-Road Pipe.. 14.7's@88
Open Y-Pipe... 14.5's@90

I did 3 runs of each.. then after I went through my set I putt back on the off-road pipe, made 2 runs.. then took it off.. ran 1 run open y-pipe NA.. then used juice to run 12's.

Testing had almost identical 60's.

I also ran 14.2 with open exuast (no backpressure).

With manuals, it may be different. Mike Huff was telling me that he lost ET in the 1/4 when he opened his cutout.

- Keith

[jmorgan]

dosnt stefan have 3" all the way back? does anyone know if his throws codes? and if your gonna get a SC stefan said the 3" elimnated the dipstick blow out.

[Deuce Bigs]

Magnus: ok i'll amend. IMHO a highflow is worthless. either offroad pipe or stock and 3" s-pipe. later, i'm still gonna get flanges put on both sides and an off road pipe with flanges so they will just be interchangeable. that will be after some form of forced induction. on my car i think i have the best setup right now. as soon as i clean the maf and change the plugs and wires i'll redyno and i'm really hoping to see close to if not 200 rwhp before any sort of tuning even though i'm about to order the MAFT+

stefan is running a full 3" exhaust and i think he may still be having a problem with his cat. :wink::wink:

i'm also running a full 3" exhaust. CIA headers, stock cat opened to 3", 3" s-pipe, and 3" borla cat-back with the full blocking plate so it basically became a single in/out for me, but i tried opening it up and there was a noticable difference in powerloss.