If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)

Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

Please note that it is not permitted to have referral links posted in your signature. Keep these links contained in the appropriate forum. Thank you.

https://www.boards.ie/discussion/2055940817/signature-rules

Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Emission nct failure..

Max Headroom · 2009-10-31 10:05:02

My car failed the test on friday on emissions...the guy said it was because i had a small leak on the middle and back box ..as these are after the sensor and cat is this possible to affect the reading..? its a 03 megane and he said this was a common problem on this model...:confused:

31-10-2009 10:05am

#1

Max Headroom

Registered Users, Registered Users 2 Posts: 6,984 ✭✭✭

Join Date: April 2009

Posts: 6750

My car failed the test on friday on emissions...the guy said it was because i had a small leak on the middle and back box ..as these are after the sensor and cat is this possible to affect the reading..?
its a 03 megane and he said this was a common problem on this model...

0

Comments

#2 31-10-2009 10:10am

BrianD3

Registered Users, Registered Users 2 Posts: 8,614 ✭✭✭

Join Date: October 2002

Posts: 8071

Yes, a leak downstream of the cat/sensor will affect the reading. It may cause the car to have a Lambda of >1.03 which is a fail.

If the hole is small it may be possible to repair the exhaust cheaply rather than replacing it

0
#3 31-10-2009 10:44am

Max Headroom

Registered Users, Registered Users 2 Posts: 6,984 ✭✭✭

Join Date: April 2009

Posts: 6750

The reading was 1.236....probably high ......

Just had a look under..theres a pinhole in the weld at the mid box..and one on the rear box too...i'll get them welded up next week...just hope it solves the problem..the PinHole fairy strikes again...:rolleyes:
tnx for the reply..;)

0