[s-cars] Intermittent hard start

[Young, Steve]

Tom and all who have replied...

I think I'll start with the FPR.  Went to the stealer, and they want $98
minus 10% club discount.  What is the best source for this part.  I did get
a fuel filter and washers to change at the same time.

Paul K. where did you go for a $40 FPR??

Thanks all. 


Regards,

				TRANE
Steven Young
Local Operations Manager
Albany Office




-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of Tom Green
Sent: Friday, March 31, 2006 11:16 AM
To: s-car-list at audifans.com
Subject: Re: [s-cars] Intermittent hard start

Steve,

Ok, I won't jump on your fuel pump.  That problem is junk and fuel varnish
preventing the check valve from letting the fuel drain from the line.

You should not have the feeling that it takes 6 revolutions.  It should be
more like an instantaneous start.  The fuel rail should retain almost all
operating pressure for more than 10 minutes providing immediate high
pressure fuel to the injectors.  If the system leaks fuel pressure it leaks
fuel, internally if the FPR allows the pressure to bleed off to the return
line.  If the FPR does not hold correct pressure when operating,
there are usually other symptoms and DTC's and MIL light blinking,   
and probably poor
fuel economy.

A fuel pressure tester would be nice, otherwise look for leaks in fuel lines
and vacuum lines close to the FPR.  Absent any leaks, suspect the FPR or its
seals.

Poor spray pattern from the injectors could cause some delay in starting as
well.

Tom  '95 S6


> Steve Young writes:

> Fellow listers...
>
> The patient is a 95.5 S6 avant with 140k miles.  The vast majority of 
> the time, the car will start within a half dozen motor rotations.  
> Over the past few months, every once and awhile, it would take several 
> seconds of cranking to start, most notably after it had been sitting 
> overnight.  It has never not started, but it is getting worse and 
> happening more often as time passes.  Now before you all jump on the 
> fuel pump, it was replaced with the fuel tank about 15 months ago at 
> 115K.  Not to say that it isn't possible it is failing, but I would 
> tend to look somewhere else first.  It almost seems like it loses it's 
> prime like a water pump.  Is it possible that the fuel pressure bleeds 
> off somehow?  Just trying to fix this before I get stuck somewhere.  
> Any collective wisdom is appreciated.  TIA
>
> Regards,
>
> 				TRANE
> Steven Young
> Local Operations Manager
> Albany Office
> *  Tel. (518) 724-1453
> * Fax (518) 785-4359
> * sryoung at trane.com

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