okay, i bought a 90 honda crx dx, #3 cylinder hadno compression whatso ever, so i decided to buy a sohczc for 350 dollars... after the motor was in, the car revved extremely fast, but now the car is revving slow, also when i mash the throttle at low rpm it hesitates alot and even bogs down before revving, does anyone know how i can fix these problems?

 

I would check the fuel pressure.If it's okay check compression