warm starting 200tq

[E. Roy Wendell IV]

> Message: 7
> Date: Tue, 13 Sep 2005 19:25:35 EDT
> From: FLIPMONDS at aol.com
> Subject: warm starting 200tq
> To: quattro at audifans.com
> Message-ID: <204.9fd82d5.3058b9ef at aol.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> Any listers have this symptom?  When my 200 is warm and has sat for 
> more than
> 5 minutes it fails to start right up again.  I crank the engine and 
> crank
> some more.....finally I put the pedal to the floor and crank some 
> more( how
> poetic!)  In any case after cranking at 10 second intervals for about 
> 20 times, the
> engine finally fires up.  My mechanic has suggested that there is 
> carbon
> build up around the valves and injectors giving less than optimal air 
> fuel mixture
> for startup.  Why only when warm though?  Any remedies short of a 
> valve job?
> Thanks
> phillip edmonds

Classic symptom of a leaking check valve on the fuel pump. You need a 
proper high pressure (approx 90 psi) guage plumbed into the fuel 
system. Crank/run engine to activate fuel pump and then turn it off. If 
I recall correctly pressure should still be in the 80 psi range after 
ten minutes. If not, it's either the accumulator or check valve, most 
likely the valve. You probably don't want to just throw parts at this 
because the check valve is located on the top of the pump, inside and 
on the bottom of the fuel tank. It's an ugly job to remove and 
reinstall the pump just to change out the $20 or so check valve but 
that's how it goes. BTDT

There's some really good info to be found at 
http://www.sjmautotechnik.com/trouble_shooting/ficis.html. If I ever 
get a chance to meet Scott Mockry I swear I'll kiss him. If it wasn't 
for him and the list I'd have never got my first Audi running well 
enough to get hooked. Then again, that could have been a bad thing.


Roy Wendell
Morgantown WV, USA
turbo quattro type 44 times 3