Too rich 5kcstq - won't idle

[Barry Babcock]

As far as I can tell, the timing is set right.  I don't think I missed 
anything there.

The car starts and runs, sounds fine, but it won't idle.  If I give it 
too much gas while trying to start it, it floods and I can't get it 
started again unless I wait a few minutes.  I tried pulling the fuel 
pump fuse and cranking for a few seconds, then reinstalling the fuse and 
trying again, but that hasn't been entirely successful either.

I tried removing the ISV and replacing it with an elbow, then adjusting 
the CO set screw, but I still couldn't get the car to idle.

I also adjusted what I take to be the "Idle Adjustment Screw" (standard 
screw on the front/top of the throttle body) in 1/4 turn increments by a 
couple of turns either direction, like the CO set screw, but it didn't 
seem to have any affect on my problem.

How can I make this heap idle well enough to get it to the mechanic?

Thanks for any words of wisdom.

-Frustrated in Denver


PS.  If there is a procedure for doing this, please provide a link--

Ben Swann wrote:

> Barry,
>  
> As long as your distributor is set so hall is "in window" the ECU does 
> the rest, adjusting timing etc.  With that said, I would try to make 
> sure that the distributor is set dead in the middle of the window - 
> with all else TDC(cam and crank/flywheel and verify #1 piston is TDC)  
> it is good then to line up the rotor so it is pointing to the #1 spark 
> lead on the cap.
>  
> With everything you did, I would expect that you would be running 
> rich.  You eliminated som vacuum leaks right?  You will likely have to 
> lean things out - use Huw's procedure, or as I do adjust mixture with 
> 3mmallen key 'til engine running at highest and smoothest idle, then 
> lean about 1/4 counter-clockwise turn for best fuel economy.  I have 
> found this generally get things right where the meter will, and last 
> time I did it the car passed with 0% CO content and low CO2.
>  
> Ben
>  
> [From: Barry Babcock <barry at moonbeast.com <mailto:barry at moonbeast.com>>
> Subject: Re: Too rich 5kcstq after reassembly
> To: quattro <quattro at audifans.com <mailto:quattro at audifans.com>>
> Message-ID: <4060D6D0.2020407 at moonbeast.com 
> <mailto:4060D6D0.2020407 at moonbeast.com>>
> Content-Type: text/plain; charset=us-ascii; format=flowed
>
> Okay, that's kinda what I thought.
> How sensitive is the ignition timing anyway?  If I'm off the timing by a
> single tooth on the timing belt, or by a couple of degrees on the
> distributor, is it possible that I could get that too-rich, won't-idle
> condition?
>
> I'm starting to think my timing may not be the issue, at least not the
> whole issue...
> Probably time to recheck my vacuum hoses.
>
> How do you adjust the mixture on one of these engines, anyway?
>
> Thanks again.
> -Barry]