emmisions
 

Hi i have a Mazda mx5 with emissions problem have put a new exhaust on and cats but still failing emissions test
has anybody had this problem and if so how was it sorted

Have you had it scanned for fault codes?
Have you had it connected to a scan tool with live data option?

yes we clear codes light goes of then come back on again 2 different people have checked it but still cant find out why emissions are all over 2 sets of lambers been fitted so double checked

You need to go into the monitors section of the ECU via the diagnostic connector and not just clear the DTC and turn the dash check engine light off.