[s-cars] Fuel Injector R&R

[Tom Green]

>
Hopefully you can find someone on this side of the pond to clean  
injectors,
Tony.  It should include a total refurbishment of the mechanical  
parts- new
seals, pintle caps and paint along with cleaning and flow check/spray  
pattern
visual inspection.  Diesel shops perform a lot of this since diesel  
injectors are
direct injection at higher pressure and flow and subject to wear and  
clogging.

A dedicated gasoline shop may have a more sophisticated flow check for
each injector rather than just a volume/time comparison for all five,  
but if the
volume is checked carefully, it should suffice for comparison.  If you  
are
matching flow for a high HP engine, you likely need more than 5 in the  
test
which would mean a dedicated shop with spares to swap, or buy 5 flow
matched injectors.

You can run BG44K and other cleaners and decide empirically  by fuel
mileage and engine performance that the injectors are good, but the
only way to verify spray pattern and balanced flow is to remove and  
check.

You probably can't buy the parts for refurbishment at the cost of a shop
total refurbishment, so sending them out makes sense to me.  Spend
your time cleaning the intake manifold.

Tom




> -----Original Message-----
> Date: Sun, 7 Jun 2009 19:39:21 -0400
> From: "Tony Curran" <tony.curran at sympatico.ca>
> Subject: [s-cars] Fuel Injector R&R
> To: <s-car-list at audifans.com>
> Message-ID: <BLU0-SMTP9668B4A8366F161100BFE08A460 at phx.gbl>
> Content-Type: text/plain;	charset="us-ascii"
>
> Hi folks,
>
> I now have 175000kms on my S6 and was wondering if the spray of the
> injectors can be improved by removing and cleaning. Is there a  
> recommended
> method for doing this? Or just run a bottle of cleaner in with the  
> gas?
>
> There's a company advertising on Ebay UK where one can send them to  
> for
> "ultrasonic" cleaning - anyone heard of this process before?