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Burg Boxster · 12-31-2011, 08:13 AM

I guess first question is why are you replacing "a couple" of O2 sensors? Rarely does more than one O2 sensor go out at a time. More likely you have MAF issues (as I think you already know based on other posts) or a vacuum leak... both often disguise as O2 sensor problems. Did you test the sensors w/ a multimeter to ensure they are bad?

Penetrating oil is fine to use.. just keep it off the new sensors and it will help if the car is warm.

Good luck

12-31-2011, 08:13 AM	#2
Burg Boxster Registered User Join Date: Nov 2006 Location: In the garage... Posts: 1,702	I guess first question is why are you replacing "a couple" of O2 sensors? Rarely does more than one O2 sensor go out at a time. More likely you have MAF issues (as I think you already know based on other posts) or a vacuum leak... both often disguise as O2 sensor problems. Did you test the sensors w/ a multimeter to ensure they are bad? Penetrating oil is fine to use.. just keep it off the new sensors and it will help if the car is warm. Good luck