Emmisions Fail!

[Paul86S2]

Len

Was the car warmed up properly before the MOT test? A cold car can give incorrect readings.

Have a look at the following link - may be useful

http://www.petercoopercarrepairs.co.uk/new_page_3.htm

Paul

[Len]

Oh yes the car was well warm and the tester gave it lots of revving and running!

[Len]

Yea thanks for that Paul, interesting reading!

[Len]

when were your plugs changed last ?

Ummmmmm........

Worth a check I suppose!

[Khare]

Oh yes the car was well warm and the tester gave it lots of revving and running!

ok, well check the wallet for £20 and offer them to the tester next time, should pass with flying colours 

[davero]

Pretty sure you will have checked this, but check your map sensor hose for leaks( the one from
the T.b. to the ecu ). This caused my emmissions to skyrocket on my old 16v

[Len]

Yea will do, that pipe needs replacing anyway coz it was bodged before!
The tester guy did suggest checking all breather hoses!

Plugs are fine! No nasty deposits! Likewise the dizzy cap and rotor arm.

[AudiA8Quattro]

Try some cataclean, i've used it to get old single point injection polo's through the test.
You can buy it from GSF.

[Len]

Here are the actual figures:-

Fast Idle 2500 - 2850 rpm
CO = .58% should be 0.3%

Natural Idle 725 - 925 rpm
 0.68% should be 0.5%

He did a Second Fast Idle test and the was worse at 0.63% But the HC came down from 71ppm to 45ppm.

[AudiA8Quattro]

Have you failed on hc as well?
Are you burning oil?