[Diy_efi] Audi idle issue

[Tom Visel]

Ernie, have you replaced your injector o-rings yet?  It seems that every 
CIS-injected car that crosses my shop's threshold has a poor idle.  I 
spray a little carb/throttle body cleaner around the injector ports in 
the head/manifold, and the changing RPM tells me that the o-rings have 
been baked by time, lack of maintenance, and the AZ climate.  One set of 
rubber and a short while later, the idle is almost always steady.

If your engine has this kind of trouble, you can chase the CO setting 
all day and never get it right.

TomV


Ernest Buckler wrote:

>>One thing that messed me up setting CO with the 308's K-jet the first
>>    
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>time,
>  
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>>you have to remove the allen wrench and plug the hole then wait a couple
>>    
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>of
>  
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>>seconds before you can get a good reading,  otherwise you have an air
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>leak.
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>>At first it seemed like the changes were not having any effect,  but once
>>    
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>I
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>>started plugging the hole after each adjustment I could just dial it in
>>perfectly.  Where are you Ernest?  My 4 gas analyzer would help if you're
>>near CT.
>>
>>Bill
>>    
>>
>
>Thanks for the great offer, Bill, but I'm in WA state near the Idaho line.
>Long drive, alas.  I'll remember to plug the hole, thanks.  ONCE I get it
>running reliably again.   Starting to warm up outside around here, time to
>get after the Turbo car - I drive an 86 Audi 5000 CS beater in the snow and
>slush.  Odd thing on that one is that it's rattled since I bought it, got a
>spare engine and trans for it figuring it would blow anytime, but for 3
>years it has started every time, passes emissions easily, and the rattle
>never gets worse.  Has 237K miles on it, gets 30-32 mpg hiway, and
>everything works.   Whereas the spiffy beautiful '89 200 turbo is giving me
>fits - somedays I feel like replacing the whole CIS if I knew of anything
>that would work - I'm new to the EFI game, could not be engineering a system
>like you guys do. More realistically, as you say, don't get rid of something
>that can be made to work, so I'll keep after this, and with this recent help
>from the group, think maybe I can figure it out.
>
>Ernie
>
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