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The car will drive poorly all the time or when weather conditions/altitude change significantly. They output a frequency signal so you can't really test them without an oscilloscope. If they're really bad you might get a code.
 

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Discussion Starter #4
the problem i'm having is bad gas mileage. i was getting 12-13 then i changed my o2 sensors and that took me to 15. i have done everything to try and get back in the 20 range with it but no luck. i've bypassed the supercharger to see if that helps, i've cleaned/checked all connections. there is no vaccum leaks. don't know what else to try.
 
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