Too rich 5kcstq - won't idle

[Ameer Antar]

If you take the air cleaner cover off and try adjusting the airflow meter flap, will the engine smooth out at all? The flap directly controls the amount of fuel sprayed into the engine. If you can control it, then maybe you just need to lean out or richen the mixture a lot more. Make sure you know which way is which. The SJM site is a good place for this info and troubleshooting procedures.

If that's not it, maybe your injectors are leaking... You can pull them out and watch the spray patterns and check for leaks w/ the fuel pump jumpered on and engine off. After that, you might need to get into measuring the fuel pressure and other CIS tests. I really doubt timing is the problem if you say there is lot's of black soot and engine flooding. But bad ignition and cam timing will definitely cause the car to run very rough. Good luck.

-Ameer

----Original Message----
Date: Thu, 25 Mar 2004 20:15:50 -0700
From: Barry Babcock <barry at moonbeast.com>
Subject: Re: Too rich 5kcstq - won't idle
To: quattro at audifans.com
Message-ID: <4063A066.30806 at moonbeast.com>
Content-Type: text/plain; charset=us-ascii; format=flowed

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]




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