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Re: 1985 Audi 4000s idling rich
| vgf | 10 Jun 2008 02:26 |
>hmmm I have not seen an '85-87 Audi 4000 in awhile. The system is a little
>different than my '83 Audi 4000S.
>Is there a Cold Start Valve that might be staying on a little too long?
>Maybe you could try unplugging it electrically and starting the engine cold
>to see what it does.
Yes, it has a cold start valve, unplugging the wire does not cause any
change, which does not seem right either. Will keep exploring.....
>>>How do you know it is running rich?
>>>Is it also idling either too low or too high?
[quoted text clipped - 17 lines]
>>
>> marti |
| dave AKA vwdoc1 | 10 Jun 2008 00:28 |
hmmm I have not seen an '85-87 Audi 4000 in awhile. The system is a little
different than my '83 Audi 4000S.
Is there a Cold Start Valve that might be staying on a little too long?
Maybe you could try unplugging it electrically and starting the engine cold
to see what it does.
>>How do you know it is running rich?
>>Is it also idling either too low or too high?
[quoted text clipped - 17 lines]
>
> marti |
| vgf | 08 Jun 2008 19:42 |
>How do you know it is running rich?
>Is it also idling either too low or too high?
[quoted text clipped - 6 lines]
>I have seen bad/leaking fuel injector seals cause some idling problems too!
>You can spray some carb cleaner at them to see if the idle changes any.
Dave,
Yes, it is running rich because you can smell the excess gas and the
engine stutters, most likelybecause the combustion chamber is
temporarily flooded with gasoline.
Thanks for the tips, they make good sense!
marti
|
| dave AKA vwdoc1 | 08 Jun 2008 18:41 |
How do you know it is running rich?
Is it also idling either too low or too high?
Check your coolant temperature sensor for the fuel injection.
Check for a weak ign coil.
Check the fuel pressure and the current to the fuel pressure regulator.
Check the fuel distributor flap level according to the Bentley. Oh and
clean that area too! ;-)
I have seen bad/leaking fuel injector seals cause some idling problems too!
You can spray some carb cleaner at them to see if the idle changes any.
 Signature
later,
dave
(One out of many daves)
> My Audi 1985 Audi 4000 is running perfectly well when warmed up after
> about one minute.
[quoted text clipped - 4 lines]
> I replaced a leaking valve cover gasket, airfilter and sparkplugs,
> checked the idle valve, but have not been able to pinpoint the cause. |
| vgf | 08 Jun 2008 04:01 |
My Audi 1985 Audi 4000 is running perfectly well when warmed up after
about one minute.
The problem is rough idle and running rich when starting the cold
engine.
I replaced a leaking valve cover gasket, airfilter and sparkplugs,
checked the idle valve, but have not been able to pinpoint the cause.
Any hints would be appreciated
marti-
|
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