I am thinking one or both of my O2 sensors may be bad. Is there a way to diagnose this using DataMaster? Even if there isn't a definite way to tell if they are bad or good, is there something I should be watching and comparing to point me in the right direction? Thanks.

 

Yes....when warm the O2s should swing between ~80 and 900mv .....if one or both are way off that its bad. Thats non-WOT. At WOT they will read in the mid to high 800s.

 

By way off do you mean that one or both of them will be way outside the 80-900 mV range?

 

Not outside....just not much swing from the 450mv centerline. If you seen me your uni file I could take alook at it if your unsure.

 

Thanks for the offer. I am going to look over the logs, but I might send you one or two of my files to look over as well.

 

yes, you can diagnose bad O2's with a scanner. I burnt mine up running open headers. They were not getting up to temp. When i looked at them on the scanner they wern't moving much off of 450mV. Every once in awhile they would jump to 0. And it would dump in alot of fuel. I bought heated O2's and put the exhaust on and runs like a champ now.

 

gb95zconv - emailed you my .uni file. Thanks again.