I have a test only smog coming up for my '90 XJ. I was going through the papers i have for it and i found a smog report from right before i bought it in april of last year. Curiously, the report doesnt have numbers for NOX, anywhere. It was also an idle emission test done at 904 and 2394 rpm. Where are my NOX numbers? Does the idle test not measure NOX?
CO2 was 14.3 (idle) and 14.8 (2500 rpm) , O2 was 0.8/0.0, Hydrocarbons came out at 34/12 (max: 120/180 ave: 30/20) and CO was 0.01/0.04 (max: 1.0/1.0 and ave: 0.1/0.1)
Its passed 7 smog tests since 1996. Failed one in 2000, but passed the next one taken only 2 hours later. Seems like they might have replaced a sensor (o2) maybe? Should i be worried about this one? Its my first smog in california, and the 'test-only' requirement has me a bit nervous. I was going to finally install my new exhaust ive had sitting for 5 months, and clean out the throttle body and IAC but didnt want to do too much more until i get the test. Since ive got it ive replaced the CCV in front and back of the valve cover, swapped out the plugs and have new dist cap and wires. Cat may/may not need replacing but i cant tell from those numbers.
Also, ive heard people mention to have the dynamo test done in 1st and 2nd gear, not in Drive. Whats the reason for this, and will the tech know to do this?
Thanks for any advice
Cheers
CO2 was 14.3 (idle) and 14.8 (2500 rpm) , O2 was 0.8/0.0, Hydrocarbons came out at 34/12 (max: 120/180 ave: 30/20) and CO was 0.01/0.04 (max: 1.0/1.0 and ave: 0.1/0.1)
Its passed 7 smog tests since 1996. Failed one in 2000, but passed the next one taken only 2 hours later. Seems like they might have replaced a sensor (o2) maybe? Should i be worried about this one? Its my first smog in california, and the 'test-only' requirement has me a bit nervous. I was going to finally install my new exhaust ive had sitting for 5 months, and clean out the throttle body and IAC but didnt want to do too much more until i get the test. Since ive got it ive replaced the CCV in front and back of the valve cover, swapped out the plugs and have new dist cap and wires. Cat may/may not need replacing but i cant tell from those numbers.
Also, ive heard people mention to have the dynamo test done in 1st and 2nd gear, not in Drive. Whats the reason for this, and will the tech know to do this?
Thanks for any advice
Cheers