cleaned the MAF and air filter and passed... but barely... i tied the limit for HCs @ 15mph.

 

Im having the same problem with my 01 3.4 tacoma ive replaced the cat the 02 and cleaned the mafs and done a tune up she runs like a raped ape but still fails smog im at the end of my wits here i dont know what else to do and dont want to pay the stealer to look at it. my only other option i think is to put the stock cat back system on it and try again. thats my only mod a magnaflow cat back but i cant imagine it changes things that much its just a muffler.

someone please help