Rep Power: 0

I know a 2004 civic ex coupe aint got much torque to begin with , but i started really noticing it a few months ago, so i have already replaced the catilytic converter and an O2 sensor too, hmm are there two 02 sensors though? I dont know, but it was the cheap 150 universal catylitic though, and that was right after new spark plugs and coils, ... And it was zooming , i could get on the highway easily with the A. C. on , but then a few weeks later its lacking power again!! W. T. Heck, Do i just need a new A. C. Compressor, i know they tested that though and said it was good , i think, i guess i need yo have them test the a. C. Compressor, but it blows cold all the time , its just no one can figure this crap out, and honda dealer is 1.5 hr drive , any ideas??

 
Rep Power: 367

which o2 sensor did you change? (answers your question about 1 or 2) I guess it's the primary, 2ndary just checks if cart is working, BTW
usually the coils go with the car to the scrapyard, you might have spent on something that was not needed...
what other maintenance have you done? air filters?

 
Rep Power: 0

Have you tried replacing the A/C relay ? my A/C was causing issues & this was the problem. I don’t know much about cars but hope this helps .

 
Rep Power: 0

I meant the ignition coils and spark plugs, but i think there was an o2 sensor when i did catalytic converter,i did 1st ,then one under the hood,so i think i did both, im thinking i might check and see if i did the map sensor,and put in a k&n intake and filter, and then see, the check engine light hasnt popped back on again yet, but we'll see,thanks for input, Like usual though i doubt what im thinking with map sensor and k&n intake will fix it ,but will be nice.

 
Rep Power: 222

Intake won't do squat