sorry for late reply, ran thru again, failed worst than b4 , wag/collector yep everything done and new and correct, egr,02, is a/c delco and only about 11/2 yrs old and i only put like 5k miles on her from last time it went thru emissions, and even then it was all tune to the max new this time it was good and toastie drove 11/2 hours on the hiway and when i got there they put right on the rollers, of course it drew a crowd while in there and they all said and i agree the cat was no good, its a small aftermarket one i had installed when i put the cat back system on,and last time it just passed (nox),ive owned her for 18 yrs and always flew thru no problems and have done the same steps everytime, now the only diff is the aftmrkt cat, so im thinking of removing the gm cat from the wagon (167k) on it and reworking it into the 91 but b able to reinstall everything back the way it was,but now its piss ass cold outside ..this will b fun