Originally Posted by Master Yodub
I know plenty of people that have passed with copper plugs, that's not the problem. Changing the type of spark plugs you run won't make you pass/fail the smog test. Are you running the stock header? Do you have any fuel system mods? What is your ignition timing at?
Motor is back to bone-ass stock. Stock everything. Fuel system has not been modified and the timing is at 14.9. 14-15 is supposed to be acceptable.