My dodge dart will not go past 70 mph at about 3000rpms?

Yes I believe the engine is capable of its full RPM range in first and second. I wouldn’t say I am 100 percent though I have been away for work and haven’t even had the chance to see if it is. I will also have to check to see if it’s a fuel problem when I get home Friday. Any more ideas on what it might be will be very helpful.

Thank you