CA Smog fail - Any tips?
#1
CA Smog fail - Any tips?
Failed both emissions tests:
At 15 mph the max allowable HC (PPM) is 49. It measured 62
At 25 mph the max allowable HC (PPM) is 33. It measured 52
At 15 mph the max allowable NO (PPM) is 409. It measured 791
At 25 mph the max allowable NO (PPM) is 696. It measured 669.
Drove it until near empty. Re-filled with Techron fuel injector cleaner and 91 octane, drove lots of freeway miles. Re-tested it. Same result. Any tips?
At 15 mph the max allowable HC (PPM) is 49. It measured 62
At 25 mph the max allowable HC (PPM) is 33. It measured 52
At 15 mph the max allowable NO (PPM) is 409. It measured 791
At 25 mph the max allowable NO (PPM) is 696. It measured 669.
Drove it until near empty. Re-filled with Techron fuel injector cleaner and 91 octane, drove lots of freeway miles. Re-tested it. Same result. Any tips?
#2
I had a similar thing with my emissions on my XJR in the uk. Turned out to be a failed o2 sensor. If you have one put a code reader on it and see what the fuel trim levels are like.
Forgot to mention that there may not be an error code from a failed O2 sensor, I didn't get one with mine but the fuel trims showed one of them had failed.
Forgot to mention that there may not be an error code from a failed O2 sensor, I didn't get one with mine but the fuel trims showed one of them had failed.
Last edited by tberry6686; 10-14-2013 at 05:59 AM. Reason: added a bit
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wotcham8 (10-17-2013)
#3
Join Date: Apr 2012
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Search here or google TC W3 especially if you are doing highway driving. It has been known to reduce emissions.
Having said that I now wait for the usual debunking! But it has done wonders on some high mileage cars in a short period and convinced me it has merit.
But above post sounds more likely.
Having said that I now wait for the usual debunking! But it has done wonders on some high mileage cars in a short period and convinced me it has merit.
But above post sounds more likely.
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wotcham8 (10-17-2013)
#4
Failed both emissions tests:
At 15 mph the max allowable HC (PPM) is 49. It measured 62
At 25 mph the max allowable HC (PPM) is 33. It measured 52
At 15 mph the max allowable NO (PPM) is 409. It measured 791
At 25 mph the max allowable NO (PPM) is 696. It measured 669.
Drove it until near empty. Re-filled with Techron fuel injector cleaner and 91 octane, drove lots of freeway miles. Re-tested it. Same result. Any tips?
At 15 mph the max allowable HC (PPM) is 49. It measured 62
At 25 mph the max allowable HC (PPM) is 33. It measured 52
At 15 mph the max allowable NO (PPM) is 409. It measured 791
At 25 mph the max allowable NO (PPM) is 696. It measured 669.
Drove it until near empty. Re-filled with Techron fuel injector cleaner and 91 octane, drove lots of freeway miles. Re-tested it. Same result. Any tips?
If you check your O sensor and it's not faulty, it maybe your cats as well - it's hard to tell remotely, but at least now you have some leads.
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wotcham8 (10-17-2013)
#5
Our cars require premium fuel (93 octane). I noticed you're using 91 octane. Use up your 91 fuel and refill with 93. Drive a few hundred miles. You may even want to add a special gas additive to make your fuel leaner. It may lower your emissions.
If you check your O sensor and it's not faulty, it maybe your cats as well - it's hard to tell remotely, but at least now you have some leads.
If you check your O sensor and it's not faulty, it maybe your cats as well - it's hard to tell remotely, but at least now you have some leads.
Doug
#6
Doug, when we went out there this summer for the VW Classic,gas was 30cents cheaper than the socialistic state of Illinois that I reside in. We were shocked. You guys also have better fast food,El Pollo Loco,In n Out and DelTaco,nottoo mention beaches.lol
#8
I had a similar thing with my emissions on my XJR in the uk. Turned out to be a failed o2 sensor. If you have one put a code reader on it and see what the fuel trim levels are like.
Forgot to mention that there may not be an error code from a failed O2 sensor, I didn't get one with mine but the fuel trims showed one of them had failed.
Forgot to mention that there may not be an error code from a failed O2 sensor, I didn't get one with mine but the fuel trims showed one of them had failed.
#9
Search here or google TC W3 especially if you are doing highway driving. It has been known to reduce emissions.
Having said that I now wait for the usual debunking! But it has done wonders on some high mileage cars in a short period and convinced me it has merit.
But above post sounds more likely.
Having said that I now wait for the usual debunking! But it has done wonders on some high mileage cars in a short period and convinced me it has merit.
But above post sounds more likely.
#10
Our cars require premium fuel (93 octane). I noticed you're using 91 octane. Use up your 91 fuel and refill with 93. Drive a few hundred miles. You may even want to add a special gas additive to make your fuel leaner. It may lower your emissions.
If you check your O sensor and it's not faulty, it maybe your cats as well - it's hard to tell remotely, but at least now you have some leads.
If you check your O sensor and it's not faulty, it maybe your cats as well - it's hard to tell remotely, but at least now you have some leads.
#13
Just a thought, have you seen the Wheeler Dealers XK8 Discovery show? They " Terra cleaned " an XK8 for better emissions and it almost halved the original readings. Its a process that cleans the fuel lines from front to back and cleans the engine internals like a de coke did in days gone bye.
Youtube may still have it showing if you are stuck for other idea's.
Good luck
Cheers,
ArtyH
Youtube may still have it showing if you are stuck for other idea's.
Good luck
Cheers,
ArtyH
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wotcham8 (10-19-2013)
#14
You can get a cheap coed reader from ebay for about $15 - much cheaper than replacing the sensors if they are ok.
When My car failed it's MOT (several faults) I had a terraclean done to see if that was the problem and then checked the emissions again - it would have passed then but after a couple of days it was failing the test again. Checking the fuel trims showed that the passenger side O2 sensor had failed.
When My car failed it's MOT (several faults) I had a terraclean done to see if that was the problem and then checked the emissions again - it would have passed then but after a couple of days it was failing the test again. Checking the fuel trims showed that the passenger side O2 sensor had failed.
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wotcham8 (10-19-2013)
#15
Just a thought, have you seen the Wheeler Dealers XK8 Discovery show? They " Terra cleaned " an XK8 for better emissions and it almost halved the original readings. Its a process that cleans the fuel lines from front to back and cleans the engine internals like a de coke did in days gone bye.
Youtube may still have it showing if you are stuck for other idea's.
Good luck
Cheers,
ArtyH
Youtube may still have it showing if you are stuck for other idea's.
Good luck
Cheers,
ArtyH
#16
You can get a cheap coed reader from ebay for about $15 - much cheaper than replacing the sensors if they are ok.
When My car failed it's MOT (several faults) I had a terraclean done to see if that was the problem and then checked the emissions again - it would have passed then but after a couple of days it was failing the test again. Checking the fuel trims showed that the passenger side O2 sensor had failed.
When My car failed it's MOT (several faults) I had a terraclean done to see if that was the problem and then checked the emissions again - it would have passed then but after a couple of days it was failing the test again. Checking the fuel trims showed that the passenger side O2 sensor had failed.
#17
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
#18
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wotcham8 (10-20-2013)
#19
#20
So, the latest news is that the right o2 sensor was melted due to high heat onto the right catalytic converter pipe which is also destroyed due to high heat (am surprised none of this triggered a check engine light). The recommended fix is to replace two o2 sensors (done) and both cat pipes (expensive). Question: Is a failed o2 sensor enough to cause heat high enough to do this or do I need to look for another cause of high heat to avoid frying the replacement o2 sensors and cats?