ok i bought a 93 civic a plain single cam nothing great about it i got it as a beater/project car but anyways when i start the car it idles at like 1500 but then it goes down to 1k then right back up then dies then the same it runs like a dream i mean i drove it 2 hours home when i bought it but besides the bad rpms going up and down when the car is idleing it sounds like its boggin or making popcorn popping sounds and the air intake sounds like its sucking wayyyyyy to much aiir the check engine light is on but its also missing a few parts like some hoes not pluged in theres a sensor missing im just not sure what to think i mean it drives fine with no issue besides it has no power for a stock single cam besides the bogging sounds at idle but it does not bog at all it takes off and goes

 

Want to try that again in comprehensible English? Punctuation marks are your friend.

Pull the CELs. Address those first.

 

 

Timing belt? Or out of time.