[s-cars] Problem with 94 S4

[brian hoeft]

My knee jerk reaction is to say multiple issues.. The wastegate solenoid is
easy enough to remove and bench test.. you could have a boost leak that's
minor, but usually it takes a big tear to make it want to stall. In that
case, disconnecting the MAF sensor would make the situation better or worse.
Better=check boost hoses, worse=probably something else..

Hopefully you learned a valuable lesson in routine maintenance with the fuel
filter. I only remember finding contaminated injectors with neglect or
abuse,,, well, until recently with some of the FSI's..

If you have *donated* to SJM for tech support youre in good hands, keep us
posted with results.

-brian



.

On Wed, Sep 22, 2010 at 9:58 PM, Gregory Wolters <gjwarch at sbcglobal.net>wrote:

> Hi All,
>
> Once again, I turn to the list.  I put in my new fuel filter and some
> issues
> have come up.
>
> I'm waiting to hear from SJM regarding a wastegate solenoid and some
> advice.
> Here's what I sent...
>
> Hi Scott,
>
> After replacing the fuel filter(which was completely clogged) I have had
> several
> issues.  I took it on  a test drive, still running rough, but all the
> cylinders
> are firing.  I  buy 2 bottles of Techronand add to the gas, thinking some
> crud
> got past the old fuel filter.   Then it starts to try to die and check
> engine
> light flickers.  I get  home and pull code 4421.  Fuel injector #5 passes
> the
> output click 5  times test so I figure the injector is dirty.  I figured
> I'd
> give the  Techron time to work.
>
> Took it on the freeway yesterday and by the  time I got to the next off
> ramp
> (less than a mile) the dash lights are  freaking out and the engine is
> trying to
> die.  I keep the revs up and  get back home.  Today I pulled code 1111.  I
> checked all grounds and disconnected the battery for an hour.  I hooked
> everything up.  Before starting I went through the output test.
> Everything
> passed except the wastegate solenoid made no sound.
>
> Started  it up, after about 30 seconds it just dies unless I rev it up.  I
> pulled the codes and got 4421 again.  Ran output test again with same
>  result...
> no noise from the wastegate solenoid.
>
> I should tell you that my turbo boosthasn't been working for awhile.  It
> worked
> sometimes when it is cold  outside, but not during normal running.  I was
> hoping
> the fuel filter  was the problem.  Perhaps it is the wastegate solenoid.
>
> So, I may  have 2 problems... a dirty injector #5 (is there a fuse or a
> breaker
> for the individual injectors?  I read about that in the output codes.)  and
> a
> bad wastegate solenoid.
>
> I checked you parts site and couldn't find one.  Are they  available?
>
> Thanks,
>
> Greg Wolters
> 1994 S4
>
> Any input would be appreciated.
>
> Thanks!
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