Ok so I have a 1991 Integra and my car started "studdering" uphill today. It happens when im in a higher gear (5th) and I press the gas to maintain speed up a hill (not necessarily a steep one either) , my car fels like its slipping or studdering under load. It also happens when I slow down and keep it in a higher gear to take a corner or I searched and found a few things it could be

-Clogged fuel filter (replaced it about two weeks ago, but didnt torque to specs due to lack of torque wrench, but its tight no leaks)
-Bad clutch (shop replaced clutch and flywheel two weeks ago so its good)
-bad MAP sensor (f**king thing is stupid expensive to replace, ill buy a new car before I replace it)
- Timing out of whack (might be able to borrow timing gun)
- Clogged cat (When I got my exhaust back in june, my mechanic said it looked like the inside of the cat was melting away and I should replace soon)

So my question is has anyone had the same problem and how did you fix it?

 

don't ask that question please. it's a common symptom, with multiple possible causes.
try disconnecting the cat and see if it goes away.
if not, check timing with a light

 

I'll try taking off the cat this week and see

 

Is it misfiring? Not long after I got my integra it started missing going up hills/under load but ran fine otherwise. I changed the plugs and that took care of it. But considering what you said about the cat I'd just try disconnecting it first