1997 Honda Accord

1997 Honda Accord 4 cyl 153000 miles

already know my car needs a new muffler very bad crack and loose side. Now it slowly accelerates when I gas it. I will press gas pedal half down and then slowly starts to move and muffler gets real loud. Will be going 40 mph with rpm at 3 and as I accelerate to get up to 65 for the freeway speed the rpm goes pass 4. Been goin on 3days. Today my engine light came on and as I pulled in the drive way it wouldnt go in there direction. Starts fine and stays running though. Had this car almost 2yrs since 130k mi dont know if previous owners ever did 90mi tune up. I was planning to have that done at 180k mi to be sure its been done while I own it. Please help me figure out whats needed to be done. Thank you!