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Author Topic: MOT Failure on Emissions  (Read 1189 times)

Offline yeshu26

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MOT Failure on Emissions
« on: November 20, 2018, 10:58:27 am »
Engine: BVK, 58 plate VW Sharan Diesel 1.9 tdi

Please see the attached sheet for failure based on the emissions test. VCD Scan found nothing.

Thanks

Offline johnnyroper

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Re: MOT Failure on Emissions
« Reply #1 on: November 20, 2018, 11:41:51 pm »
Have fuel and air filters been changed recently?

Also what sort of driving style do you do, round town etc or does it get some good runs? Might be worth doing a good old Italian tune up to blow the cobwebs out.

Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #2 on: November 21, 2018, 08:06:51 am »
Hey

1: Fuel filter has not been changed for a while.
2: Air filter cleaned yesterday. Ordered new one.

Around 5000 RPM ringing noises comes from Turbo area.

Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #3 on: November 21, 2018, 08:07:39 am »
WYNNS Emissions lower additive works?

Offline johnnyroper

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Re: MOT Failure on Emissions
« Reply #4 on: November 21, 2018, 08:25:09 am »
It’s worth banging a fuel treatment in aswell.


Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #5 on: November 21, 2018, 08:32:56 am »
Will do Chief

Whats with the ringing noise?

Offline johnnyroper

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Re: MOT Failure on Emissions
« Reply #6 on: November 21, 2018, 02:26:59 pm »
You sure it’s coming from the turbo? Seems strange it makes noise that high up the Rev range but not when it is working it’s hardest at mid range trying to reach max boost.

Offline mike wilson

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Re: MOT Failure on Emissions
« Reply #7 on: November 22, 2018, 08:43:25 am »
Excess end float/worn bearings?  Might have contributed to the emissions issue.

Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #8 on: November 22, 2018, 09:53:14 am »
Unsure where it comes from the ringing noise. I go on motorway, put the car in neutral, then rev it up till 5000 for few seconds, and that's when it comes.

Offline johnnyroper

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Re: MOT Failure on Emissions
« Reply #9 on: November 22, 2018, 11:20:18 am »
I wouldn’t think that would be the turbo as it’s not doing a great deal when unloaded revving up in neutral. If noise was from turbo it would be more apparent loaded up when working hard in my opinion.
Does it happen when revving to 5k while driving?

Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #10 on: November 22, 2018, 12:01:34 pm »
Good question, I will check.

Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #11 on: November 22, 2018, 09:10:26 pm »
During stationary also.

Offline johnnyroper

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Re: MOT Failure on Emissions
« Reply #12 on: November 22, 2018, 10:06:25 pm »
I meant when revving up to 5k while in gear?

Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #13 on: November 23, 2018, 07:00:04 pm »
No noise while in gear.

Offline yeshu26

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Re: MOT Failure on Emissions
« Reply #14 on: November 23, 2018, 07:02:55 pm »
Ok,

Took to a different garage, and passed with 0.57. That's it sorted for a year.

With limit set to .60, but I am little pessimistic about the next year's test.

New Turbo in last 8 months
Skimmed Head, new cams, valves, new timing belt et al.
222,400 miles.

What can I do to lower the emissions further?

 

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