ok my friend has a 92 civic dx 4 door 5 speed and he swapped the motor out (cause it blew up) and put in a 92 crx hf motor. it idles fine but.... it seems like it is "taching out" at around 3000 rpms. in first gear he can only hit 20mph and in second gear only 30mph. WHAT THE HELL???? we replaced the o2 sensor(used a universal not really sure the wires are right cause they are different colors but made educated guese) and a new fuel filter and regulator. so he hasnt had a check engine light untill today but it goes off and on . so i need a little help. is the crx motor that slow? or lacking that much power? the motor taken out was a 16 valve and the motor we put in was an 8 valve. so we used all of the intake and sensors off the 16 valve so they are correct (i think). he also has a new header cat and muffler.



helppp plllleeeeeaaaassee