[urq] Re: Have you Replaced Injectors - long cranking, hard starting

[Wolff]

Don't forget to change the injector seats and seat seals. At their present
age, they are likely cracked, crumbling and leaking.
Wolff
----- Original Message ----- 
From: "Ben Swann" <benswann at comcast.net>
To: "Doug Johnson" <ur-quattro at msn.com>
Cc: <urq at audifans.com>; <quattro at audifans.com>
Sent: Thursday, January 29, 2004 7:39 AM
Subject: [urq] Re: Have you Replaced Injectors - long cranking, hard
starting


> This should be in the archives - look for long cranking or hard starting.
> You need to remove all the injectors and after operating them as in a
spray
> pattern test, fuel can be seen weeping up the side of one or more.  Common
> problem on injectors on 5ktq's with over 100kmi on injectors.  That along
> with the o-ring seals that are usually brittle from heat and age you have
> air leaks plus a lean condition on startup.
>
> Other things can be culprit too, including the warmup regulator.  If one
> were to be methodical, Bentley service manual procedures including fuel
> pressure testing would be in order.  I admit, I don't always do things
> methodically as experience dictates common problems on these cars, and I'm
> not paid to do this the same on my cars as a dealer service pro. mechanic
> might be if servicing someone else's car.  A fuel pressure test would
> facilitate isolation of exactly where the problem lies.  I have found
after
> all is said and done, if original or very high miles, the injectors end up
> getting replaced with the newer Viton tipped and new O-rings.
>
> Bottom line for the n-teenth time - replace your injectors if history is
> unknown or if they are original on CIS equipped engines.  I know some may
> disagree, but to me it costs more in time and equipment, especially if
this
> is your only vehicle and not doing routine service where you are paid by
the
> hour - than to just cut to the chase and replace them.  Of course if other
> problems are evident, eg. pressure accumulator is leaking fuel on the
> ground, well then fix the obvious first.
>
> New injectors usually under $250 often result in engine that runs like new
> and will rule out this most common aggravation.
>
> Ben
> ----- Original Message ----- 
> From: "Doug Johnson" <ur-quattro at msn.com>
> To: "Ben Swann" <benswann at comcast.net>
> Sent: Thursday, January 29, 2004 2:28 AM
> Subject: RE: Have you Replaced Injectors
>
>