No power when I hit the gas!
 

When the light turns green I hit the gas and my 8 moves but it doesnt take off like I feel it should.

Its an automatic 04 with about 77k miles. Had the transmissions fluid changed, new spark plugs, used Techron to clean out the gunk in the system, recently changed oil.

After I get to 2nd or 3rd gear i get more power, but I want to be able to jump off the starting line and get going.

Also, the engine RPM's are at about 700 when idling in drive, is that low? the engine shakes and feel week.

Help!

Check coils and cat ASAP.