Cleaning oxs?

[Livolsi, Stephane]

I'll let you know on Thursday..

> -----Original Message-----
> From: Brendan K. Walsh [mailto:bkwalsh4201 at hotmail.com] 
> Sent: March 30, 2004 12:47 PM
> To: Livolsi, Stephane; Audi Quattro List
> Subject: Re: seeking list knowledge - poor running 88 5ktqa
> 
> 
> brings up a thought, if you've got a fouled sensor, say 
> covered in soot and oil and various other gunky stuff, but 
> otherwise functional, could it be "cleaned"?
> 
> "If God had intended us to walk he wouldn't have invented 
> roller skates." Gene Wilder, Willy Wonka and The Chocolate Factory.
> ----- Original Message -----
> From: "Livolsi, Stephane" <Stephane.Livolsi at investorsgroup.com>
> To: "Audi Quattro List" <quattro at audifans.com>
> Sent: Tuesday, March 30, 2004 2:07 PM
> Subject: RE: seeking list knowledge - poor running 88 5ktqa
> 
> 
> Thanks Brendan.
> I'm sorry all, I did forget to mention that the O2 sensor is 
> fairly new (installed in the 86 last summer and swapped into 
> the 88 last fall)
> 
> But..I will check as per your suggestion.  If the exhaust is 
> so sooty, then probably the o2 sensor is as well and not 
> functioning as you state. At least it shouldn't be too hard 
> to remove, since I only did it a few months ago....right....right....
> 
> > -----Original Message-----
> > From: Brendan K. Walsh [mailto:bkwalsh4201 at hotmail.com]
> > Sent: March 30, 2004 10:51 AM
> > To: Livolsi, Stephane
> > Subject: Re: seeking list knowledge - poor running 88 5ktqa
> >
> >
> > Sounds like an O2 sensor, check the dpr also. If your O2 is 
> fouled the 
> > ecu may thinks it's running lean and over compensate, hence 
> the heavy 
> > exhaust, black soot etc... regards and good luck! Brendan
> >
> > "If God had intended us to walk he wouldn't have invented roller 
> > skates." Gene Wilder, Willy Wonka and The Chocolate Factory.
> > ----- Original Message -----
> > From: "Livolsi, Stephane" <Stephane.Livolsi at investorsgroup.com>
> > To: "Audi Quattro List" <quattro at audifans.com>
> > Sent: Tuesday, March 30, 2004 12:22 PM
> > Subject: seeking list knowledge - poor running 88 5ktqa
> >
> >
> > Hello all, needing your help (again).
> >
> > My 88 5kcstq (MC1 engine) is really starting to act up on me and I 
> > don't know why.....
> >
> > Symptoms:
> > 1.  The biggest is hesitation and misfiring, especially under load. 
> > Started a couple weeks ago when accelerating in 2nd gear 
> between 2-3k 
> > rpm, it feels like something is cutting out.  Now it's 
> gotten really 
> > bad and even in first gear starting off from a stop I cut some 
> > chugging and cutting out.  Seems less noticeable/evident at 
> higher rpm 
> > - ie, I rev up to 4500 rpm and start off, there is less 
> chugging if I 
> > keep the rpm up there.  So the missing/cutout seems to be
> > boost/rpm related.
> >
> > 2.  Exhaust is stinky.  Not in a rotten egg way, but in a heavy 
> > exhaust smell way.
> >
> > 3.  Black soot on the inside of tailpipe, and black soot on 
> the ground 
> > if I idle in 1 place too long.
> >
> > 4.  Engine seems to warm up a lot quicker than it used to. Outside 
> > temps are admittedly warmer (+10C this morning -
> > woohoo!) but still seems to be getting up to quicker than last 
> > spring/summer.  (engine working harder?)
> >
> > 5.  When it was colder in AM (couple weeks ago), it started 
> off almost 
> > on the first crank, would idle nice for a few seconds then 
> idle would 
> > die down and running would become very rough to where it 
> seemed like 
> > only 2 or 3 cylinders were firing.  Upon restart, it wouldn't 
> > immediately idle but I could keep it going with part throttle 
> > application, but the running was very rough.  After 1-2 minutes of 
> > this, it would idle on it's own ok and reasonably smooth.
> >
> > 6.  Now when I start in AM it will not start without throttle 
> > application and I have to keep giving it throttle to keep it idling 
> > for the first minute or so.
> >
> > 7.  When I decelerate (ie from 4000 rpm - push in clutch 
> and lift off
> > gas) the rpm will drop steadily down to about 300 then 
> bounce back up 
> > to about 750 where it will stay.
> >
> > My other car (86 5ktq) was running very well before I 
> parked it (the 
> > 88 is the nicer of the 2 cosmetically) so I have a source of known 
> > good used parts.  So far I have taken the spark plugs and wires off 
> > the86 and put them on the 88 patient.  No improvement and possibly 
> > even worse running. Also the fuel pump is a 1 year old Pierburg and 
> > the ISV is also off the 86 car which was working well.
> >
> > The way this came on, I am suspecting something that is gradually 
> > deteriorating and getting worse.  But what would cause 
> these symptoms. 
> > What would cut out under acceleration at low rpm?
> >
> > Any ideas gratefully appreciated.  I have looked at the SJM 
> site and 
> > other resources - just looking for some additional input, maybe 
> > somebody else's BTDT.
> >
> > TIA
> >
> > Stephane
> >
> >
> >
> 
> 
> 
>