car problem 03 eclipse spyder? o2 censor?

Question

i own a 03 mitsubishi eclipse spyder gts 24valve 3.0 liter v.6 and when i get above 4500 rpms it makes a noise like its shooting out air and its killing my performance it runs like a 1.8 liter now and its pretty imbarising!!! and kills my gas milage when i get on it and my friend says it a o2 censor but im not sure does anybody have any better idea's????

Answer 1

Could possibly be a vacuum leak somewhere

Answer 2

A bad O2 sensor will trigger the MIL.(check engine light) If the MIL is on, take it to a local parts store and have the codes read. If the light is not on, the bulb may be burned out.