Hmm I have heard that chipping actually helps improve fuel ecconomy though due the increase in torque and therefore not needing to drive with so much throttle all the time. If this is the case the emmissions surely wouldn't be a problem?
I find it hard to believe that chipping would be such a common mod if it was causing this many problems to all car owners who chip?
It would be interesting to see what results other people get.
Paul W we are all waiting with baited breath for your results...
It's gone, it's all gone!!