when going up hills my vehicle looses power and overheats just below the line

What is your question?

the car runs fine other wise but when i drive hoe from work its starts to lugg out going up a incline for about 1/4 -1/2 ill drop from 60 to 30 mph by the end and the engine temp gets just below the over heat line and then as soon as im past the hill its fine . i just changed the spark plugs and replaced the coil packs and wiring harness since they were toasted when a coil melted . i checked to see if i had pcv vacuum and took the oil cap off put a rubber glove and fastened it with a rubber band and when the car was idling the give was being sucked in . also my vacuum gave me a pressure of 17psi on intake vacuum line off the air intake . i cleaned the map sensor an i have no codes throwing up and my engine light dosnt come on . so i,m thinking ,my cat is clogged . will check the o2sensors reading in the morning and see how they are .