After a week and a half at a "gross polluter" Calif. smog station, over a grand in repairs, my new 86, totally stock, GN finally passed California smog.
The mechanic still thinks something is wrong and the vehicle will fail again, but, short of replacing everything, he doesn't know what.
It's my nature to solve a problem sooner rather than later, so now that I have two years before the next smog test, I want your opinion about what is causing the failure.
First the facts, the first failed test
Co2 o2 HC CO
12.70 0.00 679 0.55 - idle
13.90 0.00 25 0.23 - 2500 rpm
the HC idle figures sent the car to the "gross polluter" station. Max in Calif. for my car is 120.
after checking plug wires, changing plugs and filters, replacing o2 sensor, replacing egr sensor, cleaning injectors, replacing the cat, checking the stock ecm for codes, the car passed, ...barely
Co2 o2 HC CO
13.0 2.3 65 0.31 - idle
14.1 0.8 19 0.09 - 2500 rpm
The car is running rich at idle but I don't know why. So, short of replacing all sensors, injectors, and the ecm,..what should I do?
Thanks for your help.
The mechanic still thinks something is wrong and the vehicle will fail again, but, short of replacing everything, he doesn't know what.
It's my nature to solve a problem sooner rather than later, so now that I have two years before the next smog test, I want your opinion about what is causing the failure.
First the facts, the first failed test
Co2 o2 HC CO
12.70 0.00 679 0.55 - idle
13.90 0.00 25 0.23 - 2500 rpm
the HC idle figures sent the car to the "gross polluter" station. Max in Calif. for my car is 120.
after checking plug wires, changing plugs and filters, replacing o2 sensor, replacing egr sensor, cleaning injectors, replacing the cat, checking the stock ecm for codes, the car passed, ...barely
Co2 o2 HC CO
13.0 2.3 65 0.31 - idle
14.1 0.8 19 0.09 - 2500 rpm
The car is running rich at idle but I don't know why. So, short of replacing all sensors, injectors, and the ecm,..what should I do?
Thanks for your help.