[urq] Starting Problem

[Ingo Rautenberg]

I'm with Pat.  These are must do tests.

Ingo

On Nov 30, 2008, at 4:08 PM, Patrick Carlier wrote:

> You can eliminate the fuel system loosing pressure in a easy way . .
> With the car in the right condition .
> Engine cold , not used for a couple of day's etc .
>
> Power the fuel pump manually by shortening the relais or use an
> auxiliary wire from the battery to the pump .
> Allow the fuel pump to run 10..15 seconds .
> That ought to assure pressure in the system .
>
> Then start the engine . If there's a noticeable improvement ,
> you have a leaking check valve or injectors leaking fuel or a bad
> accumulator .
> If there's no improvement  , look elsewhere .
> Termotimeswitch is a good first suspect , auxiliary fuel injector  
> is a good
> second .
>
> I've also had the opposite .
> Cols start injector injecting far to much , thus flooding the  
> engine when
> cold .
>
> To check or eliminate this , simply disable the injector by  
> unplugging the
> electrical connector
> Then start the engine . Cold , not run for a day or two .
> If there's a good  improvement , replace the injector .
> If there's no change check the termotimeswitch and the wiring to it .
> If thing's got worse , your cold start system is functioning the  
> way it
> should
>
> Pat
>
>
>
> ----- Original Message -----
> From: "LL - NY" <larrycleung at gmail.com>
> To: "Max Hoepli" <mhoepli at vif.com>
> Cc: <urq at audifans.com>; <audi_owners_usa at yahoogroups.com>;
> <quattro at audifans.com>; <w-t_audifans at yahoogroups.com>
> Sent: Sunday, November 30, 2008 9:45 PM
> Subject: Re: [urq] Starting Problem
>
>
>> One thing to potentially check out is leaking fuel injectors. Fuel  
>> leaks
>> out
>> of the injectors, system looses start up pressure, and long starts  
>> ensue.
>> Gets worse the longer the car sits, up to the pont that the system
>> pressure
>> drops to zero. Not only are the hard starts a problem, but the  
>> fuel is
>> also
>> leaing into (contaminating) the crankcase oil. A real telltale is  
>> if the
>> car
>> smells like gas when you walk up to it (if stored inside). As I  
>> recall,
>> CIS
>> injectors should be replaced every 60(!?!?!? some other lister's help
>> here)
>> K miles or so.
>>
>> HTH,
>>
>> LL - NY
>>
>> On 11/30/08, Max Hoepli <mhoepli at vif.com> wrote:
>>>
>>> Hi all,
>>>
>>>
>>>
>>> Starting engine with 1986 Type Turbo Quattro, sometimes when left  
>>> for
>>> longer
>>> time in cold weather the car has to be cranked for a long time, 4  
>>> cranks
>>> each 10 seconds, then car puffs and puffs and runs. Mechanic told  
>>> me it
>>> has
>>> something to do with air intake, and sensors. Ignition is not  
>>> problem
>>> according to him. He once used a T-shaped Allen screw to remedy  
>>> problem.
>>> If
>>> temperature is 5C+ there is no problem.
>>>
>>>
>>>
>>> Any comments?
>>>
>>>
>>>
>>> Max
>>>
>>> _______________________________________________
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>>> quattro at audifans.com
>>> http://www.audifans.com/mailman/listinfo/quattro
>>> ---
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>>>
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