Colin 160 miles on one tank? I must be doing something wrong…
Mike H Wantage On 23 May 2012, at 08:29, Colin Mackay wrote: > As you say Tim very interesting.... > > I was unaware that Morgans have their own emissions parameters. Are any of > the Land Rover aficionados out there aware of problems with emissions issues > with petrol Rangies? > I hope that I will be ok, as my recent repairs involved complete new exhausts > including catalysts (yes both sides) Thank goodness for insurance! > > I have found on a couple of occasions my +8 was very close to failure, once I > was phoned to take it away for an Italian and bring it back hot when it > passed. > I now always ensure that the petrol is NOT SUPERMARKET for the test, as on > both the occasions I had issues, it was running on their jungle juice. > With an MOT due early next month I am off to empty the tank with a trip to a > Jockmog lunch at Kilwinning some 80 miles distant so 160 miles should just > about empty the tank. > > Off out into the sun!!!!! > > Colin Mackay > > From: Carpenter, Tim [mailto:[email protected]] > Sent: 23 May 2012 08:01 > To: mogtalk2 > Subject: RE: [EXTERNAL][mogtalk2] Sweating at the MOT > > > Dave, > > Very interesting. This tallies with something Keith at BHM told me, when I > mentioned that my Plus 8 was struggling with the 1.03 lambda high limit. > He said -- don't worry, Morgans have a different limit. It seems the tester > has to apply the standard test with its limits, and then move on to the > Morgan's exception test, within the testing software. My tester in the > past few years has managed to get a green reading even though just for a > second, and passed it. I guess he wanted to avoid having to move to the > extended test. > > As suggested though, some testers may be unaware of this for Morgans, so I'm > glad you've found the book of words. (Which is a very interesting read > -- most tests I've watched haven't really followed the porcedure, and also > I'm amazed quite how many other cars have wider lambda limits). > > Tim > > > > From: Dave Wellings [mailto:[email protected]] > Sent: 22 May 2012 20:29 > To: mogtalk2 > Subject: [EXTERNAL][mogtalk2] Sweating at the MOT > > Some of you will no doubt know all about this, but here is my story from > yesterday, just posted on Talkmorgan. > > MOT today. The form has now been dumbed down. Instead of the green hard to > forge certificate, it's a simple white page print out, with any advisories on > the right hand side. > > What's more interesting, and worrying is the Lambda requirement. This > measures the fuel/air ratio at the tailpipe, and is between two parameters, > which for my Morgan is (allegedly) 0.9 to 1.03. This is a very narrow band. > On the screen, this displays as a red band with a narrow green pass band. The > measure is shown as a white bar, and is taken at a prescribed 'fast idle' - > just under 3000rpm. It was a struggle to get below 1.03. After a couple of > attempts the tester managed 1.025. A high reading indicates a leak in the > exhaust system, but both tailpipes produced the same effect. There is no > obvious leak, but the Lambda shows a weak mixture. > On checking last years result, it was 1.024, so that was right at the top > end. The machine can't be conned, so exceed the limit and you will fail. > > The science: > Lambda is a measure for the mass air to fuel ratio present during combustion. > When exactly enough fuel is combined with the available free oxygen, the > mixture is chemically balanced and is called stoichiometric. > > Lambda = 1 —stoichiometric mixture > > Lambda < 1 —mixture is rich, excess fuel present > > Lambda > 1 —mixture is lean, excess air present > > The amount of air that is needed depends on the type of fuel used. In the > case of petrol, a stoichiometric mixture consists of an air/fuel ratio of > 14.7/1. > Peak power is at Lambda 0.84 to 0.90 > Optimum economy at Lambda = 1.05 > Optimum emissions at Lambda slightly below 1.0 > Thinks……I wonder if the ECU is set for 'economy'..... > ………………………………………………………………………………………………………………………………………. > More news. > I was concerned enough to look further into this. > The emission data is published each year by VOSA and is here: > http://www.dft.gov.uk/vosa/repository/Emissions%2017th%20Edition.pdf > > This is the "In service emission standards for road vehicles" - seventeenth > edition. Published in February 2012 and available on the link above. ISBN > 978-0-9549352-7-6 > > Morgan is on pages 97 and 98......... > The data shown covers the following: > Normal idle: > Max CO limit (%)vol: All models 0.5 > > Normal idle speed Min Limit and Max Limit RPM. > Varies as follows: > 4/4 1.6EFI CVH 750-850 > 4/4 1.8EFI MVH 850-950 > Roadster 3.0V6EFI 750-900 > Plus 4 2.0 T16 850-950 > Plus 8 3.5 750-850 > Plus 8 3.9 750-900 > Plus 8 4.6 750-900 > Plus 8 4.0 750-900 > 4/4 2.0 Duratec 700-900 > 4/4 1600 Sigma 650-1000 > Aero 8, 4.8 Manual/Auto, Max and SS 650-1000 > > Fast idle > Max CO limit(%vol) 0.3 all models. > > Max HC limit all models: 200 > > Minimum Lambda: All models 0.9, EXCEPT Plus 8 4.0 and ALL Aero's which are > 0.8. > > Maximum Lambda: All models 1.05. (NOTE, this means that my 1.025 is well > within parameters). > > Minimum RPM - Fast Max limit RPM > 4/4 1.6EFI CVH 2800-3100 > 4/4 1.8EFI MVH 2800-3100 > Roadster 3.0V6EFI 2750-3000 > Plus 4 2.0 T16 2500-3000 > Plus 8 3.5 2500-3000 > Plus 8 3.9 2500-3000 > Plus 8 4.6 2500-3000 > Plus 8 4.0 2500-3000 > 4/4 2.0 Duratec 2750-3000 > 4/4 1600 Sigma 2500-3000 > Aero 8, 4.8 Manual/Auto, Max and SS 2500-3000. > > So if you have any Lambda troubles on test, refer the tester to this tome. > > By the way, my MOT man is very good, and well used to my odd cars, but was > obviously unaware of the upper Lambda limit for Morgans. > <image001.gif> > > Dave > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ConocoPhillips (U.K.) Limited (registered in England and Wales with company > number 524868), ConocoPhillips Petroleum Company U.K. Limited (registered in > England and Wales with company number 792712) and Burlington Resources (Irish > Sea) Limited (registered in England and Wales with company number 3440053) > each having its registered office at Portman House, 2 Portman Street, London > W1H 6DU (each company being referred to as the “Company”) > > The information in this e-mail is confidential and for use by the > addressee(s) only. 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