Idle Hunting - '87 5kcstqw

[Swann, Benjamin R. (BSWANN)]

Problem solved - it was definately the ISV.  For once I didn't overlookd the
obvious.

Ben

> -----Original Message-----
> From:	Swann, Benjamin R.  (BSWANN) 
> Sent:	Friday, October 12, 2001 12:27 PM
> To:	Swann, Benjamin R.  (BSWANN); 'quattro at audifans.com';
> 'harchris at smokesignal.net'
> Cc:	'Steve Jensen'
> Subject:	RE: Idle Hunting - '87 5kcstqw
> 
> Sounds like a similar problem as what mine is doing.  Car will buck when
> it gets in the idle range..kindof like you are giving it the gas then
> letting off abruptly, over and over..Annoying to say the least.
> 
> BTW - no codes when I checked.
> 
> [[From: George Harris <harchris at smokesignal.net>
> Subject: 5000CD TQ - Surging in 2nd
> 
> Car is running well. Pulls strong in any gear. Smooth. Until I gear down
> into second and try to decelerate just using the engine compression. The
> car surges and bucks. Most prevalent in 2nd. If I just give a bit of gas
> it smoothes right out, but I want to slow down smoothly in traffic. Does
> anyone know where to start?
> 
> Cheers
> George]
> 
> 	I'm sorting out issues with the new to me 5000 Turbo Quattro Avant.
> This problem cropped up while I was driving it back from Georgia to MD.
> The car began surging while I was driving it and slowed to speeds under 50
> MPH.
> 
> 	I am trying to isolate culprit - engine is hunting for idle, revving
> to about 1500RPM then dropping down to around 700 repeating about 1/sec.
> 
> 	I checked the throttle screw ( this had caused similar problem
> before with my other '87 5kcstqw), the o-ring looked good.
> 
> 	I haven't found vacuem leaks - yet.
> 
> 	I disconnected the ISV connector - no change.  I forgot what is
> supposed to happen.  I may resort to cleaning it, but dont think this is
> the problem.
> 
> 	I'll be checking the throttle switch next.
> 
> 	Looking for other ideas and clues.
> 
> 	TIA
> 
> 	Ben]