Fw: Re: "Boing" - Noise when I Stop!

[Richard J Lebens]

Sounds like an ABS problem.  Turn it off and see if the problems go
away and take it from there.


--- mlgraham at bmi.net wrote:
> 
> 
> ---------- Forwarded message ----------
> From: mlgraham at bmi.net
> Date: Mon, 29 Mar 2004 0:05:40 PDT
> Subject: Re: "Boing" - Noise when I Stop!
> 
> Hi John!
> 
> I checked all of the fastners, and they are all tight.  I check the
> spindle, steering, etc., all are tight.
> 
> I have had problems with the brakes in the past.  Usually I use a
> light
> touch on the brake pedal and down shift for slowing.   I have been
> heavier on the brakes since installing the new axle, and still get
> the
> "boing" noise when I hit the brakes hard.  
> 
> Also at a stop with the engine idling, I can hold my foot on the
> brake
> pedal, and the pedal will pulsate, and sink to around 2" off of the
> floor.  I am thinking my bomb is bad.  I replace the fluid and hoses
> last 
> fall.  The master cylinder is new within the last two years.  
> 
> The pump is suspect, as if the air temp is up around 80, or the car
> is at 
> operating temperature, the brake light will flash when idling at a
> stop
> light, but will go out if I rev the motor up.  I guess I have some
> more
> problems to check out.  
> 
> Engine is still a bit rough, so maybe the fuel injection needs
> tweaking.
> Had the Cad converter checked, and the muffler shop swears the engine
> is
> running rich, as the converter was excessively hot.  I checked the
> timing, and the cam timing marks line up at idle.
> 
> Keep in touch!
> 
> 
> 
> 
> 
> On Fri, 26 Mar 2004 21:00:18 -0600 "John McMahon" wrote:
> 
> > I'd check all of the fasteners that you worked on during this R&R
> for 
> > proper
> > seating and torquing.  Then, you could ...safely... give the left
> front
> > strut a shake to see if you could get it to make any odd noises, or
> get it
> > to move.  Caliper, hub, rotor, strut, hub carrier, half-axle,
> control arm,
> > top bearing, spring, hub nut, ball joint, outer tie-rod end.  Then,
> > I'd look
> > for a bushing failure or disintegration.  It is likely one (a loose
> > fastener) or the other (failed bushing).  Something is causing the
> left
> > front spring to resonate.  I would give this problem immediate
> attention,
> > IMO.
> > John McMahon
> > 1984 4000S quattro
> > 1990 Coupe quattro 20V
> > ----- Original Message -----
> > From: <mlgraham at bmi.net>
> > To: <quattro at audifans.com>
> > Sent: Friday, March 26, 2004 6:37 PM
> > Subject: "Boing" - Noise when I Stop!
> > 
> > 
> > >
> > > Well,  I put in a rebuilt front drivers side axle in my 86 5000
> TQ, and
> > > all of my vibration, horse power issues disapeared during my
> > initial test
> > > drive of about four miles.
> > >
> > > The next time I jumped into the car to drive it,  It started
> making
> > > "Boing" noise like a large spring letting go every time I come to
> a
> > > complete stop.  Also, the brake flashing triangle is now comming
> on.
> > >
> > > Is this normal for a rebuilt front drive shaft? Does the axle
> need to be
> > > aligned in some manor when its reassembled?  For the brake
> flashing
> > > light, could I have knocked the sensor out of alignment?
> > >
> > > Or could the braking/front suspension be moving which cause the
> original
> > > axle to tear the front boot at the wheel, and this same
> > > braking/suspension movement is now its starting to work on the
> new
> > > rebuilt axle, which may cause it to fail?
> > >
> > > Any assistance would be greatly appreciated before I climb back
> > > underneath the car!
> > >
> > >
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> > 
> > 
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