1998 Subaru Outback check engine light

I checked exhaust no leaks I checked for intake leaks didnt find any the engine misfire on 1& 3 clys I erased the codes and it didnt come back over 600 miles but no 1 misfired after engine ran rough with no power and than the car wouldnt go so I checked the fuel pressure it readed 24 lbs with hose connected and 24 lbs with disconnected no change I think the misfiring might be caused by the engine hesitating and loss of power when you step on the gas and it would go what do you think thanks

Hi zackman

I finally fix the problem I replaced the fuel pump and the car has been running good for 400 miles no hesitating or loss of power no more codes or check engine light thanks for the help in finding the problem but now the catalyst monitor is not ready all the other one are can you tell me how to get it to be ready I have driven on the highway 150 miles slow roads medium speeds short drives
any ideas on how to get it ready only days left for reinspection

thank again john

Well I cant believe it I just cant believe it the catalyst monitor went to ready but quess what the check engine light came back on--- for code p0420 catalyst efficiency below threshold bank 1 (what)
this is the first time for this code I check the exhaust
for leaks no leaks up front-- but have one after catalyst convertor at the flange on the pipe side down stream--- could this have set off this code--- the car was running fine for 2 weeks.I. Am going to change the pipe today

Hi zackman

I replaced the exhaust pipe behind the rear converter it was broken on the pipe side at the flange. Converter side was ok. (New gasket. New pipe all tight). I cleared the code and I will drive it around. Hope that was it
ill let you know what happen. Thanks again

The light came on again code p0420 no other codes---no exhaust leaks ---car runs fine---- what should I do next -- there are two converter on this car -- if the catsalytic is bad do I have to replace both -- if so do you know why

thanks john