help with k24de

[fwd-lol]

hi everyone, i just bought a nissan 1992 240sx se and it was fine wen i was driving it last couple days, till today wen i drove the car and felt like the car it's not runing right and it doesn't pass the 4000 rpm, and u hear the vesle in the engin!!! it would be great if u guys can help me out..i just found out about this web site its awsome :) thank you
and also the check engin light its on and already change the oxygen sensor but its steel. if u guys have any idea wat it could be comment about 240s!!
thank you again

[SmogSUX]

Proper English helps. What is "vesle? Did the check engine light come on when this problem occurred or was it on when you bought it? Did you check the code the ecu gave you or did you replace the 02 sensor just because?

[project-D180]

check ya maf to while your at it

[fwd-lol]

sorry i ment (whistle)...i think thats the belt adn couple vacum leaks. but when i bought the car the guy told me it was oxygen sensor and yes the check engin light was on but not flashing or anything. i replace the oxygen sensor,maf sensor, spur plugs and also check the ecu if its fried but its not. i found the riped hose from egrs and replace that but still dosn't pass 3000...actuly it got worse now it has no power and doesn't go more than 20mph and it lags really bad when it goes up to 20mph... i can't even tacke the car on drive way no power at all.....but the car idols perfect it stays under 1000. i did what i thought may be its cuzing it..i don't know if there is a sensor or something that its cuzing it... any ideas what i could be? thank you for responding guys