What Ben said but add; bad plug wires, coils, or plugs. Very doubtful it's an issue with a dirty carb since you probably don't have one. Again, year, make, model, engine, mileage?

Check all of these above and also check your transmission

The carb is dirty based on what we know.

Fuel restriction, air restriction, exhaust restriction, timing issue.. whats the year/make/model?

try getting a new fuel filter

HOW LONG SINCE THE LAST TUNE UP?