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Any updates?

My car too failed aircare with 100 cell cats and i have replaced the exhaust with stock, new plugs and a can of "guaranteed to pass" additive.

Just running the tank through the car before i re-test.

 

I ran half a tank of fuel with the "Guaranteed to pass" stuff in the tank , along with the stock exhaust and I passed.

I was worrying bc the afr showed rich most of the time. WHat a pain to swap exhausts just to get a pass but the alternative is not driving!!.

I have the number of the guy i borowed the exhaust off of in vancouver if you want it.

 

I just got my car to pass air care in Vancouver yesterday with a speedtech xflow and 100 cell cats as well as an epl stage 2 tune which turns the post o2's into ready mod only. No problems, they never put my car on the dyno they have always just plugged in the computer.
Go to the location on united blvd in coquitlam, that way at least they won't do a sniff test just a computer check.

 

OME tune? after market?
are you using the bad shell 94 octane?