Catalyst Monitor

[BOWHNT]

I've driven my 99 Suburban hundreds of miles now trying to get it to complete the drive cycle and it won't complete the catalyst test. I've tried all kinds of methods. Anybody have a suggestion? This is for CA smog.

 

[BOWHNT]

I've driven my 99 Suburban hundreds of miles now trying to get it to complete the drive cycle and it won't complete the catalyst test. I've tried all kinds of methods. Anybody have a suggestion? This is for CA smog.

I found this on the CA Bureau of Automotive Repair. Why didn't the smog shops tell I could have one monitor not ready on a 99?

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[Big D]

Some of those smog techs only know enough to pass the certification to be able to smog cars. ive schooled smog techs a few times. Last smog tech tried to tell me my timing was off on an old accord I got..... he was looking at the wrong timing mark ( white mark is TDC, red mark is where its suppose to be at)

 

[BOWHNT]

Great news! Got it smogged today. Turns out in CA you ARE allowed one monitor not ready for gas vehicles 96-99. Wish I had know that 500 miles ago.