eek, Low RPMing after changing fuel filter on 87 5KCSQ

[Adam Jansen]

OK, I replaced my fuel filter, and now my baby is complaining....

When I push the clutch in, the RPMs will drop to about 250rpms for a second
and work back up to 700.  And occasionally when I start the car it will
hover around the 250 until I gun it up to over 3000 then it settles to the
proper level...
this did NOT happen before I replaced the fuel filter... (cap and rotor
changed over at the same time, as was air filter)...

Did I break something?

Adam
87 5KCSQ