CA Smog fail - Any tips?
#21
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Oil was changed recently. Switched to a high viscosity (15w) synthetic blend in an effort to stop a slow leak, but slow leak persists.
#22
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Hey Wotcham,
I pulled out the latest smog check numbers for my by-yearly Kalifornia check (July 2013) and found that the measured HC was ZERO at both 15mph and 25mph and the NO numbers were also both ZERO. These are essentially the same as what the same check station recorded in 2011.
I wonder if there is something wrong the the equipment your smog check station is using??
Doug
I pulled out the latest smog check numbers for my by-yearly Kalifornia check (July 2013) and found that the measured HC was ZERO at both 15mph and 25mph and the NO numbers were also both ZERO. These are essentially the same as what the same check station recorded in 2011.
I wonder if there is something wrong the the equipment your smog check station is using??
Doug
My 04 BMW passed with flying colors + it turns out high heat has destroyed the right o2 sensor and right cat pipe. My question now is whether the defective o2 sensor caused heat to escalate or whether there is another cause of high heat as yet undetected which may fry my new o2 sensors and catalytic converter pipes?
#23
#24
#25
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The most likely scenario is that the o2 sensor failed which would make the bank of cylinders run rich which in turn overheated the cat.
If the cat is truly overheated it will be partially clogged or sometimes cracked/broken and you will be down on power also.
For cars failing nox emissions only, I can highly recommend Lucas cleaner, the can says guarantied to reduce nox and it has worked several times for me.
If the cat is truly overheated it will be partially clogged or sometimes cracked/broken and you will be down on power also.
For cars failing nox emissions only, I can highly recommend Lucas cleaner, the can says guarantied to reduce nox and it has worked several times for me.
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