missing at high rpms

[Guest]

my z26 started acting up today.  it seems like it is missing at higher rpms like anything above 3 grand.  so far i have put in a new ignition module and a new fuel filter.  i am not geting an ses light either.  another thing is that it wont do it all the time.  it will do it for awhile then it will come out of it and run fine.  what should i try next

[yellow3800]

plug wires are allowed 1000ohms per inch.  check those for general maintenance reasons, but it could be plugs.  I doubt this too if the car received new plugs recently [