MOT people, CORRECT emission figures for E39 M5??
Discussion
Not going too much into the whole story but my car failed it's test a while ago last time I was in the UK, and I would like to clarify if it was tested correctly for the emissions part.
Under "MODEL" it reads "5 ser (E34) M5 Sal" (its an E39), I was miffed and surprised it failed, then a couple of days later I looked at the results with the intent of checking them, and I noticed it said E34!!!!
So simple question, did it fail because it was tested as an E34, I realise it's an older engine, but it's also a smaller engine too, or does it make absolutely no difference and it would have failed anyway?
For the record it failed by a tiny amount, so I'm not overly concerned of any major faults, I havent driven the car for almost 4 months as Ive been away and it's been in the garage, so again i dunno if it just needs a good run or theres a sensor thats duff somewhere, but garage did a diagnostic on it before test (apparently) and said there were no logged faults.
Before someone says "call and ask", i travel a lot so it's not the first thing on my mind, but also I'd like to go back when I am home next week with all the facts and see what they have to say. It also failed on the headlights so it wouldnt have passed anyway, so I'm not going to ask for money back or anything like that, just want to know what i'm talking about when i go in.
Under "MODEL" it reads "5 ser (E34) M5 Sal" (its an E39), I was miffed and surprised it failed, then a couple of days later I looked at the results with the intent of checking them, and I noticed it said E34!!!!
So simple question, did it fail because it was tested as an E34, I realise it's an older engine, but it's also a smaller engine too, or does it make absolutely no difference and it would have failed anyway?
For the record it failed by a tiny amount, so I'm not overly concerned of any major faults, I havent driven the car for almost 4 months as Ive been away and it's been in the garage, so again i dunno if it just needs a good run or theres a sensor thats duff somewhere, but garage did a diagnostic on it before test (apparently) and said there were no logged faults.
Before someone says "call and ask", i travel a lot so it's not the first thing on my mind, but also I'd like to go back when I am home next week with all the facts and see what they have to say. It also failed on the headlights so it wouldnt have passed anyway, so I'm not going to ask for money back or anything like that, just want to know what i'm talking about when i go in.
The levels tested are percentage values rather than absolutes so engine size should have little bearing. Emissions values and test have become increasingly stringent over the years so it's likely that an E34 may have more easily attainable threshold values than the E39 , if so then it should be easier to get through a test with the E34 levels. It could simply be that the engine needs a proper thrashing to get the cats up to a good working tenmperature and working effectively.
Dave
Dave
As above the current test has no need for model info. Every car is tested to a set value on idle and fast run. The values are dependent on the year of production. The older the car the more higher the percentage allowed.
Some times there will be a notice which staits that a particular model can not meet the Basic Emissions Test. And should be tested with model specific measurements but not on the m5 as far as I no.
Put an injection cleaner in it take it for a long run with will lots of high ish revs 3-4k. Then when you arrive ask them to do the emissions test first so it won't cool down too much.
Don't thrash the ass off it. That can make it worse with unborn fuel in the system confusing the O2 sensors and cooling the cats.
Some times there will be a notice which staits that a particular model can not meet the Basic Emissions Test. And should be tested with model specific measurements but not on the m5 as far as I no.
Put an injection cleaner in it take it for a long run with will lots of high ish revs 3-4k. Then when you arrive ask them to do the emissions test first so it won't cool down too much.
Don't thrash the ass off it. That can make it worse with unborn fuel in the system confusing the O2 sensors and cooling the cats.
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