Racepak o2 sensor
 

I found that th o2 sensor power was disconnected on a car I bought. I think this was about 5 runs ago with some moving and idling. Does this destroy the sensors?

Re: Racepak o2 sensor
 

That's powers the heater for the sensor. Without the heater, the sensor needs the exhaust to get it hot enough to produce a signal. Which is how the original single wire O2 sensors worked. Any damage to the sensor gets back to the age old argument, does leaded gas actually ruin O2 sensors?

Re: Racepak o2 sensor
 

If you have a good volt meter IE Fluke or equivalent you can check it your self. You did not say what the application is but the voltage numbers will change very rapidly and depending on fuel mixture will range between .8 to .3 volts. You can make the fuel mixture rich or lean and see if the O2 sensor responds. Heated O2 sensors in my opinion are pretty tuff and take some extreme conditions to ruin them.

Re: Racepak o2 sensor
 

Yes, it absolutely does. They are a consumable part for the dyno. We have had this conversation with Superflow in the past and they agree that there is no fix, the leaded fuel just flat doesn't work with them longterm. We even tried reusing malfunctioning sensors on pump gas motors to see if they would 'clean out', no luck. Bosch seems to be the best but we have a large pile of burned out ones.

Re: Racepak o2 sensor
 

A related question. If you had the choice between a fuel injection system with the Bosch sensor or a NTK sensor. Is the NTK worth $200 more? They claim they last longer with leaded fuel.

Re: Racepak o2 sensor
 

Our experience is that Bosch seem to live longest.

Re: Racepak o2 sensor
 

Rob,
Non related to the Racepak question. I killed a Bosch sensor after 6 dyno pulls and 2 passes when I switched to EFI. I switched to an NTK and they survive a full season. They are not cheap. I purchase a new one each year during Holley Days at a discount. BTW I run C-16, and have not had one fail.

Sean