Popping Sound In My Exhaust

[Matt S.]

Certainly not anything bad
I get small pops during idle because I'm running a
way-too-rich idle mixture
Any rotary owner will tell you a catless rotary will
pop and throw *FLAMES* because of the richness of the
mixture off-throttle :))

Happy motoring
-Matt
89.5 200 TQ
14psi

--- Rave Racer <Ravewar at rogers.com> wrote:
>
>     Actually it's cause be being rich mixture
> mostly, not lean, but the hole
> in the exhaust and the advanced timing could be the
> cause.  The hole might
> be the only reason you can hear it.  Glad I could
> help.
>
>        Rave Racer
> '89 Jetta 1.8L 16V GTX
>  http://www.vwot.org/members/Pete.html
> '87 Audi 4000 Quattro Sedan
>
>
http://www.audifans.com/registry/view.php?action=viewCar&carid=110
> '72 Triumph GT6
>  http://motorcities.com/contents/01I3H011116682.html
> '83 Toyota Tercel (yoda)     Possible future
> Sandrail donor...  Maybe
>
> ----- Original Message -----
> From: Iain Atkinson <iain.atkinson at tesco.net>
> To: Rave Racer <Ravewar at rogers.com>;
> <quattro at audifans.com>
> Sent: Friday, May 03, 2002 10:58 AM
> Subject: RE: Popping Sound In My Exhaust
>
>
> > Thanks for the reply, doesn't sound like a major
> problem, the car isn't
> > running lean i have had this checked recently, the
> ignition timing has
> been
> > advanced a little though and i do have a small
> hole in the centre box on
> the
> > exhaust.
> >
> > Iain
> >
> > -----Original Message-----
> > From: Rave Racer [mailto:Ravewar at rogers.com]
> > Sent: 03 May 2002 13:40
> > To: Iain Atkinson; quattro at audifans.com
> > Subject: Re: Popping Sound In My Exhaust
> >
> >
> >
> >     Nah.  I like my popping sound, but I'm crazy.
> >
> >        ... However, it is a backfire.  This is not
> entirely unusual in
> > itself, but if your exhaust is intact then you may
> decide to try to tune
> > this out.  It is basically extra fuel, that is
> unburned, firing sometime
> > after it has passed your exhaust valves.  This can
> cause problems down the
> > road clogging or just plain destroying your Cat
> and or leaving Carbon
> > deposits on your valves, headers and exhaust, not
> to mention the
> > environmental impacts.  If you need to pass an
> emissions test soon, I'd
> get
> > it looked at.  The back fire can be a problem
> caused by the fuel
> > distributor, low spark, to high exhaust flow,
> oxygen sensor, timing....
> > there are many reasons.  Under the right
> circumstances any car will back
> > fire.  Alot of people don't realize that their
> cars are backfiring because
> > their exhaust is quiet enough to keep it from
> being obvious.  In my case
> my
> > car sounds like "Vroooom POW, banga bang", but
> like I said, I'm crazy.
> You
> > might want to get professional advice before doing
> any major work.  You
> may
> > only need an adjustment on your fuel distributor
> ($20 job at an
> experienced
> > Audi Mechanic).  I'd even suspect that a nice new
> set of good spark plugs
> > may do the trick.
> >
> >        Rave Racer
> > '89 Jetta 1.8L 16V GTX
> >  http://www.vwot.org/members/Pete.html
> > '87 Audi 4000 Quattro Sedan
> >
>
http://www.audifans.com/registry/view.php?action=viewCar&carid=110
> > '72 Triumph GT6
> >
> http://motorcities.com/contents/01I3H011116682.html
> > '83 Toyota Tercel (yoda)     Possible future
> Sandrail donor...  Maybe
> > ----- Original Message -----
> > From: Iain Atkinson <iain.atkinson at tesco.net>
> > To: <quattro at audifans.com>
> > Sent: Friday, May 03, 2002 8:03 AM
> > Subject: Popping Sound In My Exhaust
> >
> >
> > > Hello All,
> > >
> > > my 87 Coupe Q (2.2 5 Cyl engine) makes a popping
> sound in the exhaust
> when
> > i
> > > lift off the throttle at anything above 2000
> rpm. Any ideas what the
> cause
> > > might be and is it something i need to worry
> about????
> > >
> > >
> > > TIA
> > >
> > >
> > > Iain
> > >
> >
> >
>


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