The Cel lights.....
My 2004 350Z has 20.000 Km and from 5000 Km (last September) had the following setup :
Crawford Cats and Plenum
Jwt Pop
Borla True dual
Last week the Cel light ....hte Nissan tester says that the cats don't work correctly (oxygen default)...We had reset the ECU...
Today morning the CEL lights again....the car runs perfectly.....
My question : It does'nt bother me that Cel lights ( i repeat the car runs perfectly at the moment) , but there will problems in the future ?????

 

There most likely will be no problems down the road cause it is just the O2 sensor telling you your cats aren't working efficient enough, but something to think about....my CEL light has come on twice and gone off twice now due to what I believe is a bad tank of gas. Both times it came on with the new tank of gas and went off within a day of getting the new gas. Not sure if this theory is correct, but its an idea.

 

^^^^^The CEl light will come on if the gas cap isnt sealed correctly

 

Yea I heard that too, but i checked last time and this time and it is def on all the way.

 

Just buy the non foulers. Do a search for the help method.