86 Coupe - funny noise & ISV

[Steve Sears]

Mark,
As Ed said, it's the fuel pump.  They get noisy and sound like a can of bees 
long before they fail.  Coupes have the pump mounted on a tray under the 
car, instead of inside the tank like the 5000 etc.
For the ISV, I _HOPE_ you didn't use brake cleaner.  Brake cleaner will 
certainly destroy the seal in the ISV, you might as well start searching for 
a new one.  Even Carburetor cleaner is too aggressive, Throttle Body cleaner 
should be the fluid of choice - get a 9 volt battery (not 12 volts) remove 
the ISV from the car and make the valve click with 9 volts.  Blast it with 
TB cleaner and then operate the valve - if more junk comes out with another 
blast of TB cleaner, rinse and repeat as necessary.  Not sure if the 86 
Coupe ISV is the same as a MC engine ISV, if it is, then if you can blow 
through the valve, then it's bad.
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
----- Original Message ----- 
> From: "Mark Donohoe" <mdonohoe at axcessisp.net>
> Subject: 86 Coupe - funny noise & ISV
> To: <quattro at audifans.com>
> Message-ID: <005c01c7448b$98d30e60$6401a8c0 at James>
> Content-Type: text/plain; charset="us-ascii"
>
> Told you there would be more.  Today, a new funny sound.  It is an
> electrical device located under the car towards the rear.  It seems like 
> it
> is near the passenger rear tire.  Didn't have a chance to really crawl 
> under
> there this morning, but from what I can see, there is some kind of Bosch
> cannister (bout the size of a Coke can) in the vicinity of this steady
> whining noise.  It does not change pitch with the RPMs.  It's just a 
> steady
> whirring sound.  I drove for 45 minutes to work and it never changed.
> Anyone have an idea what this is?  I haven't had a chance to check the
> manuals.
>
> On another note, I am trying to get this thing to start and stay running
> without sitting on the accelerator for 5 minutes.  I tried to clean the 
> ISV,
> but not sure I did it right.  I read all I could last night from the
> archives.  So when it talks of cleaning with brake cleaner, are we talking
> about submerging this thing for an hour or can I just spray a bunch into 
> it?
> The spraying I did last night had no impact on the idle.  It runs like 
> crap
> when I start.  But once I start driving, it's fine.  Any suggestions would
> be great.
>
> Thanks again,
> Mark D