[V8] flashing cat light

Wed Feb 18 20:09:15 PST 2009

Thanks guys for the quick responses. I'm going to try to get it on a lift
this friday. And check the cats out. I would really like to take them off
all together. I have an exhaust guy that will have NP taking the cats off.
:D

On a side note....what is out there as far as exhausts go for the V8Q?? I've
only heard of one system, and that's what Mr Wainright is running. Stebro I
think it is?

Thanks!

On Wed, Feb 18, 2009 at 10:42 PM, Ed Kellock <ekellock at gmail.com> wrote:

> Exactly.  I had the same issue.  It would start flashing way before it was
> likely that the cats were overheating.
>
> You can take out the passenger side carpet and console side piece and get
> to
> the wires from the sensor that run through the floor.  That is how I was
> able to determine that there's a short... I could get the light to go out
> by
> wiggling them.
>
> Ed
>
> > -----Original Message-----
> > From: v8-bounces at audifans.com
> > [mailto:v8-bounces at audifans.com] On Behalf Of Seamus O'Carey
> > Sent: Wednesday, February 18, 2009 8:35 PM
> > To: V8 at audifans.com
> > Subject: Re: [V8] flashing cat light
> >
> >
> > I did notice during our recent snow that if I drove through
> > an area where the snow was deep enough to touch the bottom of
> > the car the cat light would go out for a while.  I figured
> > the snow cooled things down enough to temporarily make the
> > light go out.
> >
> > However, what still confuses me is that the cat light is
> > flashing from the moment I start the car.  It couldn't
> > possibly be overheating that quickly. Maybe the vibration
> > from the snow hitting the bottom of the car was able to
> > wiggle the wires into making contact for a short amount of time??
> >
> > Seamus
> >
> > On Wed, Feb 18, 2009 at 7:02 PM, Ed Kellock
> > <ekellock at gmail.com> wrote:
> >
> > > There is a sensor in the back outside corner of the passenger side
> > > cat.  It is a heat sensor to tell you when/if the cats might be
> > > overheating. However, if the wire to the sensor is broken for any
> > > reason, the light will flash.  Mine had an intermittent short and
> > > would flash almost all the time. I was able to wiggle it
> > and make it
> > > stop so I knew it wasn't a temp issue.
> > >
> > > In other words, you may not have an issue with your cats at all.
> > >
> > > I don't believe the warm start issue is related.
> > >
> > > There are diagnostics for the cat sensor.  There's a relay in the
> > > passenger side footwell that controls the sensor.  If you
> > remove the
> > > relay, the light will no longer flash.  It will still come on
> > > initially when you turn the key on and then go out just like normal
> > > when you start the car.
> > >
> > > Ed
> > >
> > > > -----Original Message-----
> > > > From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On
> > > > Behalf Of Seamus O'Carey
> > > > Sent: Wednesday, February 18, 2009 7:56 PM
> > > > To: V8 at audifans.com
> > > > Subject: Re: [V8] flashing cat light
> > > >
> > > >
> > > > I have pretty much the same issue.
> > > >
> > > > Your options are:
> > > > A. Remove them, but unless you have the equipment to remove them
> > > > yourself, you'd have to find a shop willing to do the
> > work.  It's a
> > > > HUGE fine if they get caught, though, so most won't want to. B.
> > > > Rather than remove them you can just gut them (jam a rod through
> > > > them over and over until nothing is left inside), but
> > again you'll
> > > > have to find a way to remove and replace them.  If our cats are
> > > > bolt-ons it won't be a problem, but if they're welded in place
> > > > you'll have the same trouble as option A.
> > > >
> > > > I was thinking about just gutting my cats if it turns out they're
> > > > just bolted in place, but it seems like cats are usually
> > welded at
> > > > least at one end.
> > > >
> > > > Seamus
> > > >
> > > > On Wed, Feb 18, 2009 at 5:42 PM, Curtis Helton
> > <fatboy03 at gmail.com>
> > > > wrote:
> > > >
> > > > > Have had that every since I bought the car. It runs great. No
> > > > > hesitation, stuttering, ect. Only thing it does every once
> > > > in a while
> > > > > is it will not start and stay running after it's warmed up.
> > > > I have to
> > > > > give it some gas to keep it running.
> > > > > After I take off in it, it's fine.I did VAG it and their
> > > > were NO codes.
> > > > >
> > > > > Several questions here.
> > > > >
> > > > > 1. Can I get rid of the cats all together w/o to much trouble?
> > > > > Thinking I would like a little louder exhaust than
> > stock. Also no
> > > > > emission testing. So, no worries there.
> > > > >
> > > > > 2. As far as how it doesn't want to stay running while
> > > > trying to start
> > > > > it after it's warmed up.Would that have anyhing to do with the
> > > > > cats?
> > > > >
> > > > >
> > > > > TIA,
> > > > >
> > > > > Curtis
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