as for the o2 sinsor do it your self . you can buy them a lot cheaper. just soak the sinsor with rustoleum spray to help break it loose , the day before make sure its cool.. i think the sinsor is 150-180$ install and plug in. it will make your computer think a lot better increase hp and fuel econamy!!!!its locted near the catalatic converter.
the ecu usualy works or it doesnt . hes ripen you a new hole!!!!!!


turbo, if you have good boost and no smoke your turbo is likely good.but you can take the inlet boot of and look inside. if you see a black dry resadew your tubo is fine. if there is a slimy black thick oily substance it leaking oil from the seals by the bearings. it should be smoking if it is bad . the turbo would be so hot it would have to burn the oil and come out of the exhaust!!!!if there is a problom contact majestic turbo in waco tx. that is who i use . he will upgrade and rebuild it for about 350.00. have a mechanic take it off and reinstall it for about 200.00. mail me back if you want to know more about this . wesmel720@cs.com. ask for wes.