Dervs and emissions tests

[dieselnutjob]

my 607 is on the rev limit several times every day so it doesn't bother me

[Jikovron]

Surely an engine and gearbox is designed to be able to run under no load at max rpm as its possible to create those conditions over the period of a minute or longer on the motorway when the car teeters on the point of over run descending long shallow inclines ,imo the mot test would only be a cause for concern for timing belt roulete engines and fucked but still runners

[beko1987]

Blue smoke when held at full chat, no load? That may be the piston rings not behaving as they're designed to. 

If it only does it once a year for 3 minutes then I don't mind! It was ever so faint, on the 3rd flooring. Rest of the time it occasionally chugs out the normal xud-ness it does if I haven't driven above 2k revs for a few days.

 

Passed well within the specs, last year it barely scraped through and all I've done is 2 oil changes and a new exhaust, so it must have been the exhaust!

[twosmoke300]

Or the weird mix he runs it on that has stuck all the rings up

FTFY

[Noel Tidybeard]

the 1st mot for my 106 1.4d had a printout showing the test

they managed a maximun engine speed of 6600 which is 1100 OVER manufacturers specs!!

[Richard]

How would they know what the engine speed was?

[twosmoke300]

Either your pump had been played with or the rpm pickup on the smoke tester wasn't working correctly

[scaryoldcortina]

I'd go for the latter. The RPM pickup on our smoke meter has a vague guess at revs based on alternator output. I don't think it's ever got it right.