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Old 06-04-19, 01:32 PM   #1
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Default 207cc 1.6 failed on emissions

Hi all,
I have a 2007 207cc 1.6 vvti, (petrol) car has done 78,000 miles
and its failed its mot on emissions, on HC and CO (will try and add the print out) CO = 0.58 and HC = 343 lambda = 1.064

any ideas, car has had a full service, new cat, new bottom lambda sensor, also had 2 new variable valve timing solenoids as garage told me that's what it was, and nothing is showing on a fault code reader. also the timing has been checked. its a great little car drives spot on, sometimes a bit lumpy on tick over, also tried new coil packs,
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Old 06-04-19, 01:35 PM   #2
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Hopefully you can see this ok
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Old 06-04-19, 01:36 PM   #3
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This should be better to see
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Old 06-04-19, 10:41 PM   #4
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A "too rich" or in other words too much fuel not enough air mixture would put your HC and CO high but I noticed the engine oil temperature was by passed, was it even tested above 80?
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Old 07-04-19, 09:43 AM   #5
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If you have had to drain coolant at anytime, make sure system is bled properly as air can make it run rich.
Also notice you had a post cat lambda but its the pre cat lambda that does the mix, think i would be tempted to try a cheap used genuine one.
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Old 07-04-19, 10:23 AM   #6
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Quote:
Originally Posted by stripe88 View Post
If you have had to drain coolant at anytime, make sure system is bled properly as air can make it run rich.
Also notice you had a post cat lambda but its the pre cat lambda that does the mix, think i would be tempted to try a cheap used genuine one.
ok thank you i'll try that
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