[s-cars] Problem with 94 S4

[Gregory Wolters]

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!