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brand new o2 sensor olny knocked it down .6 (without the everclear) what else could i replace

ok so im almost out of ideas how can you bring down exhaust temps i fixed all the vac leaks im at my wits end this is what i have so far apparently im running lean my cat is good and i have replaced 15 feet of vac line under the hood what else can i do to bring down the nox...

checked the egr and its good going through and replacing all vac lines those are the only leaks i can find

87 N/A 197000 miles first time i took it through co 10.1985 gpm needs to be under 30.0000 pass hc 1.0167 gpm needs to be under 2.0000 pass nox 4.6270 gpm needs to be under 3.0000 fail the second time i took it through ( with a bottle of everclear in the tank) co...

yea im avoiding it at the moment im also wondering if i passed hydrocarbons and CO if the cat is actually doing its job

ok so i took a look around under the hood and i got an idea (after i tested the egr valve with a vac pump and found it to be in good shape) maybe the 20 year old vac lines might be causing the problem the vac lines look like the had never been changed so i started changing them out, i only...

hmmm ok so first things first i guess ill be replacing the cat the next thing is that ur not the first person (today) to say somthing about my egr probably being messed up so do i just buy another egr valve or is there a way to clean it im just wondering cause im trying to get this thing...

the guy said im running really rich and the car actually runs like a champ no boging, smooth idle, plenty of power im just wondering if the cat failed because it was just too old whats funny is that evrything else passed

because its my dd and my only car i can fix it come next friday im just short on cash the whole reason for the rush is that my temp registration is almost up the car needs a new cat but i wont have the cash till friday there are no other issues with the car ( ive fixed them all already)

ok so i went through and failed for emissions nox being too hight can i just dump some pure alcohol in the tank with some gas right before i go through and get a better result?