[flyingplatypus]

The PO who brought the car over from europe installed a cat and O2 sensor, which was working before, but the tech said that instead of getting a sinsusoidal reading from the O2 control it is jagged, not sure what that means. He said that I either need to replace the whole system with a US one or replace the O2 control, I'm quite confused as to how there is an O2 sensor when the euro's didn't have one to begin with.