Ok i tired searchin for a answer put found none. i was checking my spark plugs the other day and the bottom, ends of my spark plugs were white. I just read a c-speedracing.com how to about compression testing and it says if my plugs are white it means im runnin lean. I have a 94 ls, i took my air box cover off and i have a catback exhaust with 2.25 piping. I didn notice a lost in power but i just want to know what can i do to fix this problem thanks