[urq] Starting Problem

[Patrick Carlier]

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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>>
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