Originally Posted by mandio23
Is cams and yes these are OHC. I'm running a twin air intake that I bought on Ebay and custom headers.
I took it for a test drive last night and both of my oxygen sensors died. Could it be something wrong on Tune?
It depends on how you got the tune done. Some companies you tell them your mods and they tune it to what they think. These usually end up being VERY rich and with little/no timing increase. Other companies will send you a base tune, have you data log and email it back, send you another tune, and repeat until it's good.
If both your oxygen sensors (front and rear O2) are bad, I believe the default is to run VERY VERY rich (this is how it is on my Mustang). That will definitely drop your performance.