zackx93

So i had the usual ignition coil failure and replaced them (all 6) off ebay $200, sweet deal. But the problem is I replaced MAF, main cat and both far most front 02 sensors BEFORE i had the coil issue. now my pre-cat is bad.......

How many pre cats are there in the front? because is there is more than one im sure their all bad with my luck. . also, after i replace this pre-cat should i do 02 sensors again? I'm thinking about just doing this b***h front to back pretty annoyed with it so far..... labor is compliments of pops anyway.

Anyone who is experienced in this CAT thing please chime in !! any feedback is appreciated.

ranmas2004

iTrader: (2)

There are 2 pre-Cats right off the exhaust manifolds (1 on each bank) and then another cat after both sides of the exhaust connect into one. So 3 in total.

I have no idea weather you should replace the secondary O2 sensors after the precats. Try it without replacing the O2 sensors and see if it works.