Anyone know what year 928 became 50 state emissions compliant?
11-03-2017, 02:10 PM
#31
Smog tests are about money and standardization. They will not test the gas cap as there is no way to test all the old strange types. The new ones on more recent cars are standard and they seem to sometimes test those.
A 928with non working evap but good cats and a good clean tune will pass.
A 928with non working evap but good cats and a good clean tune will pass.
11-03-2017, 02:49 PM
#32
Chronic Tool Dropper
Lifetime Rennlist
Member
Lifetime Rennlist
Member
The last several years of testing for my car had a STAR requirement included. It cost a little extra vs a "standard" test station, but otherwise didn't seem to affect what they actually tested for. Maybe the operator training requirements were greater. Regardless, the guy at the corner Unocal station in my last OC neighborhood was a previous 928 owner and quite proactive.
My very first visit to his place was following a PennySaver (weekly throwaway advertising mailer) ad for a discounted test. The testing was going marginally OK (25 MPH NOx was up there) and he alerted me to it before the test was completed so he could abort it without reporting a failure. We went back and forth a little on options. I mentioned that the discount wasn't an issue, and passing was, so could we retest with the gear selector in a lower gear. With the TV cable loose and the car already in top gear at low RPM, NOx was increasing. For the full test price and the test in second gear, it passed with flying colors. I bought lunch for the crew there and we were buds from that point forward. It's possible the car would have passed in subsequent years with plumes of smoke from the tailpipe, but I didn't test that theory. Instead, the actual tailpipe numbers provide a loose guide to how the car is running. The actual NOx numbers were slowly creeping up over the years, to the point where they were pretty high even with the 25 MPH rolling test done in second gear. That symptom drove injector replacement during an intake refresh exercise, and tailpipe numbers were restored to the same they had been when the car came to me with 20k miles showing. The testing and the numbers really do tell a lot about what's going on inside.
My very first visit to his place was following a PennySaver (weekly throwaway advertising mailer) ad for a discounted test. The testing was going marginally OK (25 MPH NOx was up there) and he alerted me to it before the test was completed so he could abort it without reporting a failure. We went back and forth a little on options. I mentioned that the discount wasn't an issue, and passing was, so could we retest with the gear selector in a lower gear. With the TV cable loose and the car already in top gear at low RPM, NOx was increasing. For the full test price and the test in second gear, it passed with flying colors. I bought lunch for the crew there and we were buds from that point forward. It's possible the car would have passed in subsequent years with plumes of smoke from the tailpipe, but I didn't test that theory. Instead, the actual tailpipe numbers provide a loose guide to how the car is running. The actual NOx numbers were slowly creeping up over the years, to the point where they were pretty high even with the 25 MPH rolling test done in second gear. That symptom drove injector replacement during an intake refresh exercise, and tailpipe numbers were restored to the same they had been when the car came to me with 20k miles showing. The testing and the numbers really do tell a lot about what's going on inside.