MG-ROVER INFORMATION PAGES

VEHICLE TEST and the EMISSIONS

On a vehicle which has passed all of the required criteria, steering, brakes, electrics and then fails on just the emissions, can be a problem and inconvenience, especially on these cars. When this could have been checked before hand by doing an emissions test prior to the mot, most smaller garages will offer to do a basic emissions test with no charge, or maybe for just a couple of quid.

Emissions Testing 2004 ZR 

Not all emissions tests are going to be successful, a short and direct drive to the testing station is one of them, engine may be hot, but wont be at its full working and operating temperature.

Our own procedure before taking the pre-booked annual test, is to add some fuel additive, then a good long drive to achieve the vehicles fully operating and running temperatures, then arriving at the test station a few minutes before our appointment, knowing  that the successful emissions test done several days earlier, should not be much, if anything of the slightest concern.

A Few Test's During Year 2010 to 2020 

Year 2010 Engine temp measurement, by manual observation of cooling fan.

Fast Idle Test

Engine Speed---manual check

CO-------------------0.00 % vol

HC----------------------10 ppm

Lambda-----------------1.00

Natural Idle Test

Engine Speed---manual check

CO--------------------0.00 % vol


Year 2015 Engine temp measurement, by manual observation of cooling fan.

Fast Idle Test

Engine Speed---manual check

CO-------------------0.03 % vol

HC----------------------12 ppm

Lambda-----------------1.01

Natural Idle Test

Engine Speed---manual check

CO--------------------0.04 % vol

Year 2020 Engine temp measurement, by manual observation of cooling fan.

Fast Idle Test

Engine Speed-----2700 rpm

CO----------------0.00 % vol

HC-------------------11 ppm

Lambda--------------1.00

Natural Idle Test

Engine Speed------850 rpm

CO----------------0.00 % vol

The emissions test in most cases, is generally carried out after all the other vehicle checks have been completed, not as you arrive, this allows the engine to cool down slightly and will show the tester if the car is in a genuine and tip top condition, and has not been thrashed just to get it through the emissions. Video capture shown below was taken from the MG during a warm up run prior to the 2011 M.O.T 

All information on this site, applies 'only' to our own 1996 Rover 200 Series and the 2004 MG-ZR 120+  .