Ok. So I bought this 2000 Honda Accord off Craigslist for 2 gs. Its a LX. Ran fine for the test drive. And the following day. Then the check engine light came on. And started running like crap. It would have trouble going up hills. Any size hill.. Sometimes it would kick in and be fine for a while. Now. I start it it runs rough. Tapping the gas it will rev up.. But want to die. Just had a tune up. Because i went to have the codes read it said misfire on all cylinders.. Needs a tune up.. Still doing it. Had mechanics look at it. $600 in sensors and tests.. Nothing. Helllp

 

welcome to the forum. May need valve adjustment.

 

Check your fuel filter,could have gotten water in the fuel.

 

The 98 to 2002 Accords have the fuel filter in the tank at the end of the pump (no external filter).
OP, are you still getting any codes? If so, post them up, as they might help us out.