My truck failed the California smog test. Passed the visual and functional portion and there are no codes showing. On the smog inspection report it is high emitter profile. I must take it to a Star Station The emission test HC (PPM) results:
15mph RPM 1404 Max 62 Ave 36 Meas 89
25mph rpm 1343 Max38 Ave21 Meas 73
CO (%) results:
15mph Max 0.45 Ave 0.4 Meas19
25mph Max 0.55 Ave 0.5 Meas 0.20
NO(PPM) results:
15 mph Max 512 Ave 147 Meas 786
25 mph 536 Ave 189 Meas 513
Results: Fail
I asked the technician what would cause it to fail, and he said he did not know. In 2022 I bought it to get smog test and at that time they said my truck was equipped with the wrong catalytic converter. I was able to get a CARB Executive Order for the catalytic converter showing it is approved for my truck. I had to go through the BAR Referee to get the documentation. Now that it is not passing the smog test, I don't know what to do. A new catalytic converter costs almost $600. I do not want to spend the money if it is not what is causing the failure. The truck is running good. It had a high idle about a month ago, but I adjusted the timing and now it is correct. I replaced the distributor cap, rotor, spark plug wires and plugs approximately 3 months ago (3,000 miles ago) I changed the oil last month and replaced the air filter. I do not know what more I should do at this point. What could I check? I have been told Catclean is a good product to put in the fuel to clean things out. I have to get my fuel down to 1/8 of a tank and my tank is almost full, so it's going to be a few days until I am able to put it in my fuel tank. Any assistance is greatly appreciated. Thank you in advance.
15mph RPM 1404 Max 62 Ave 36 Meas 89
25mph rpm 1343 Max38 Ave21 Meas 73
CO (%) results:
15mph Max 0.45 Ave 0.4 Meas19
25mph Max 0.55 Ave 0.5 Meas 0.20
NO(PPM) results:
15 mph Max 512 Ave 147 Meas 786
25 mph 536 Ave 189 Meas 513
Results: Fail
I asked the technician what would cause it to fail, and he said he did not know. In 2022 I bought it to get smog test and at that time they said my truck was equipped with the wrong catalytic converter. I was able to get a CARB Executive Order for the catalytic converter showing it is approved for my truck. I had to go through the BAR Referee to get the documentation. Now that it is not passing the smog test, I don't know what to do. A new catalytic converter costs almost $600. I do not want to spend the money if it is not what is causing the failure. The truck is running good. It had a high idle about a month ago, but I adjusted the timing and now it is correct. I replaced the distributor cap, rotor, spark plug wires and plugs approximately 3 months ago (3,000 miles ago) I changed the oil last month and replaced the air filter. I do not know what more I should do at this point. What could I check? I have been told Catclean is a good product to put in the fuel to clean things out. I have to get my fuel down to 1/8 of a tank and my tank is almost full, so it's going to be a few days until I am able to put it in my fuel tank. Any assistance is greatly appreciated. Thank you in advance.
Apr 19, 2024 at 2:58 PM
