20 replies to this topic

[KernowCooper]

Idle mixture should remain constant for the MOT, if its stalling it weak, mines set at 3% and has no MOT Issues

Edited by KernowCooper, 21 May 2015 - 07:00 PM.

[olly33]

Any pointers on how I can achieve similar results to yours,without cocking the lot up,please? Cheers

[blacktulip]

before the mot was it running ok?

[KernowCooper]

Mine is set at 10degs at idle with the vacuum off and plugged and 3% co on a gas analyser and with a 276 cam passes the MOT with no issues, if you have a high HC reading with those settings then they will retest it at 2000rpm and take another reading, or the garages that understand how to test older cars will.

[olly33]

Hard to say bud,as I could only drive down my side road which is small before,as I had not mot etc.
I was told it was setup at Slack racing,but then why would it fail a mot for being to rich. You could smell the fumes from the exhaust before,that it was really running rich.

[olly33]

Sorry to bring it back up,but as i have not made any adjustments yet,and do not want to mess with the timing again for now,will it be ok to just turn the mixture screw in a bit to richen it up before i can get it set up correctly after checking the needle etc.

 

What if any, can running it weak or rich for that matter,affect the engine....Cheers again Olly