Hello, I have a 1995 Corolla (1.6L, 150,000 miles)) and it failed the CA emission smog test (Failed the Nitrous Oxide/NO test at 15 MPH/Passed the NO test at 25 MPH). Smog tech said I should have run the car for at least a 1/2 hour before bringing it in to be smogged so everything was HOT...