[s-cars] misfire

[Philip Mische]

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I've got a problem with my 95.5 S6.  Here's the setup:
  a.. In Feb I had a POS channel go bad.  I swapped over the wires to use t=
he spare channel and things were fine.
  b.. A few weeks later came another misfire.  When I went to diagnose it t=
he motor went back to hitting on all 5 again, so I couldn't figure which cy=
linder had the problem.  I figured I was losing another POS channel, so I b=
ought a new one from a lister.
  c.. Over the past few months the misfire would pop up again, then quickly=
 disappear, usually after I turned the car off and then started it back up =
again.  Like running a Microsoft based car.
  d.. Yesterday the misfire came, but this time it didn't leave.  Using the=
 remove-the-fuel-injector-plug method I determined it was #4.  That made se=
nse, since the POS for #4 was the one that had the bad channel from Feb.  I=
 found the new POS I'd purchased months ago and popped it in, and guess wha=
t?  No change!  I swapped out the other POS just to be sure, again no chang=
e=2E  Darn.
  e.. Checked the spark plugs, they were all tight.  I changed the #4 spark=
 plug and the miss was still there.
Soooo, what's the next likely place to look?

Thanks in advance,

Phil
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