Been there done that!
Hope this is a fix for you.
I found one of the injector ground wires under the intake air
distribution was off, it contacted with gravity most of the time but made
the engine Hiccup occasionally. Really got bad a few times.
I'd suggest that you check these wires and add an engine ground.

Stan Wilder

On Sat, 3 Aug 2002 23:07:16 -0400 George Averill <averill@LDL.NET>
writes:
> Any idea from anyone why my engine starts to skip after about 50
> miles of travel at 60 mph?  Seems like it simply shuts off for a
> couple of seconds then runs, then does this off and on for a while.
> Then straightens out and runs OK for a while before starting up
> again.  Worked on the fuel tank last week.  Could a fuel filter be
> the cause?  I would think a clogged filter would slow the fuel all
> the time and not intermediately.  Any other ideas on what to check?
> Haven't changed plugs in a while.  Can they do this?  If I depress
> the accelerator while all of this is going on, things seem to get
> worse.
> George
>

________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today!  For your FREE software, visit:
http://dl.www.juno.com/get/web/.