Injector Seal Kit, major improvement, minor investment

[Bernie Benz]

Pete,

I can understand replacing the O-rings if they were leaking air into or out
of the IM, but was there anything obviously wrong with the plastic injector
caps, other than discoloration causing you to replace them?

Bernie

> From: "Peter Petersen" <pwpetersen at earthlink.net>
> Date: Fri, 22 Aug 2003 08:44:18 -0600
> To: "200Q20V" <200q20v at audifans.com>
> Subject: RE: Injector Seal Kit, major improvement, minor investment
>
>
>
> Hi Brandon:
>
> You can remove them off with a screw driver if careful.  Mine were so
> old they cracked and then would come off easily.  The new ones popped on
> with finger pressure and a rag so the end of the needle didn't poke a
> hole in finger.  The hardest part was getting the rail out as the lower
> end of the injectors were somewhat stuck in the manifold.  Leave the
> square fuel rail on the injectors including the injector retaining clips
> and you can get all injectors out at once, with some light pursuasion.
> If injectors are really stuck, you should remove them individually.
>
> Everything else is a breeze.  Lubricate the o-rings with oil or greese.
> Also, use a q-tip to lightly lube the bores the o-rings slide in.
>
> Pete
>
>
>
> -----Original Message-----
> From: Brandon Rogers [mailto:brogers at terrix.com]
> Sent: Thursday, August 21, 2003 8:51 AM
> To: Peter Petersen
> Subject: Re: Injector Seal Kit, major improvement, minor investment
>
> Pete-
> I have this little kit in my garage but have yet to do anything with
> it.
> How do you properly remove the old plastic tips?  just pry them off?
> Any
> other tips greatly appreciated.
>
> TIA-
>
> Brandon
> '84 urq 20V
>
> ----- Original Message -----
> From: "Peter Petersen" <pwpetersen at earthlink.net>
> To: "200Q20V" <200q20v at audifans.com>
> Sent: Wednesday, August 20, 2003 9:55 PM
> Subject: Injector Seal Kit, major improvement, minor investment
>
>
> This is a multi-part message in MIME format.
> --
> [ Picked text/plain from multipart/alternative ]
> Hi All:
>
>
>
> I just wanted to pass this along.  I recently replaced the injector
> o-rings and plastic cap that snaps on the end of the injector (after
> 150K).  I probably should have had the injectors professionally cleaned
> etc but am too cheap.  Anyway, I have noticed a significant improvement
> in cold start idle and performance under load is more stable.  The
> engine used to have an occasional high load misfire (very light) that I
> could never quite resolve.  Also, the occasional stall when coming off
> high boost, even after replacing all the usual suspects.
>
>
>
> For 25 bucks (from the Audi dealer), it was a big improvement.  If some
> of you have high mileage injector o-rings and unexplained ³reduced
> potential² issues, you may want to give it a try.
>
>
>
> I think when cold, the worn o-rings were not sealing properly hence poor
> idle and bad exhaust smell.  The smell still isn¹t great but is more in
> line with a 150K engine.  I think there was another problem under
> certain vibrational loads the injectors would leak, resulting in part
> and high load misfires.  I was beginning to suspect an ignition problem,
> but the engine now runs great.
>
>
>
> In the intake manifold, there is a plastic insert the injector slides
> into.  I cleaned these out with carb cleaner, q-tips, and a vacuum
> cleaner as most of them were stuck in the manifold.  Everything took
> about 1.5 hrs.  When snapping the cap on the end of the injector, make
> sure not to damage the needle pintle as it is external to the injector.
>
>
>
>
>
> Pete
>
>
>
>
>
> --
>
>
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