[s-cars] [scars] 95.5 S6A fuel pmp check valve failing

[Tom Green]

You are getting good advice here, Randy, so don't argue about it.  The  
list just decided your question didn't need an answer, because your  
assertion that the FPR
seems to be doing its job appears to be wrong.  It appears that the  
FPR could actually be the bad boy here.  You didn't say what test you  
ran on it, but it does not seem to be maintaining pressure in the rail  
after shutdown or you would not have so much trouble restarting.

I'm not saying don't change the fuel pump because it probably is about  
time to beat the odds and not have to change it on the road somewhere,  
even though the avant is so easy to work on.  It has an integral check  
valve in the pump.  I think the stock replacement pump will serve you  
fine.

Tom '95 S6
          '95.5 S6 avant
Knoxville, TN

On Friday July 20, 2012, at 11:42 PM,"McCall, Randy"  
<rmccall at nexant.com>  wrote:

> Thanks Graham, but the question is stock pump or other, and is the  
> check valve part of a stock or other pump?  Filter has been changed  
> recently, FPR seems to be doing its job correctly.
>
> -----Original Message-----
> From: Graham Hicks [mailto:urs6turbo at yahoo.ca]
> Sent: Friday, July 20, 2012 3:56 PM
> To: McCall, Randy
> Cc: s-car-list at audifans.com
> Subject: Re: [s-cars] 95.5 S6A fuel pump check valve failing
>
> You are on borrowed time for sure with 175 on the original pump, but  
> the fuel pressure regulator (on the end of the fuel rail, not  
> included with a pump) would be a good starting point too.
> I would replace the fuel filter too.
>
> Graham
>
> Sent from my iPhone
>
> On 2012-07-20, at 7:47 PM, "McCall, Randy" <rmccall at nexant.com> wrote:
>
>> I've been driving relatively trouble free for too long apparently!   
>> My 95.5 S6A has recently started showing signs of hard starting -  
>> after it shuts down the cranking time has now gone way up.  I at  
>> first though perhaps the CPS was going south with some of the first  
>> hot weather we've had here in the Willamette valley, but I'm now  
>> more convinced that it's the check valve that isn't holding  
>> pressure in the fuel lines.  Car runs perfect once it gets fuel,  
>> but takes several tries to get it to kick off after I've driven and  
>> shut the car off for more than 10-15 minutes.
>>
>> This is a chipped car with about 175K on the original fuel pump - 
>> presumably, as I don't have records of it being changed prior to  
>> when I bought it at about 92K.  Probably time to do a FP before it  
>> also fails...Any consensus on whether to replace the fuel pump with  
>> stock instead of other aftermarket choices, and does a stock FP  
>> include a new check valve?  Relaying the FP could be part of the  
>> replacement process as well as I see that is often a recommendation.
>>
>> Thanks,
>>
>> -Randy