Emissions Fail on petrol car

zorro262

Hi i recently bought audi a3 1.6 petrol 06

Car failed on emissions

Low idle 1.12% limit 0.30

High idle lambda 0.93 to pass shouldnt be between 0.97-1.03

High idle 2.74% limit 0.20

Hc 269 limit 200

Could that be just from hole in exhaust? Or more likely catalytic converter and lambda sensors?

cnoc

https://www.boards.ie/discussion/2058289743/emissions-fail-on-petrol-car

What did the NCT say?

zorro262

Well they didnt tell me anything what could cause high emissions. All those numbers from emissions are from the nct centre

A hole in the exhaust usually causes high lambda readings.

Yours looks like it's running very rich.

First thing is see if there's any codes stored. There could possibly be a lambda sensor issue. If it was the cat you'd see high CO but good lambda.

Is it burning oil? Blue smoke etc. That engine, assuming its an 8 valve BSE is probably burning oil.

zorro262

Codes that i have are all related to lambda sensors but i though it get bad readings due to hole in exhaust. Its not burning oil i changed oil 4k km ago for 5w30 and there was no need to top it up.

moceri

Replace spark plugs and new air filter. Take it for a long journey on a motorway. Short drive cycles contaminate the engine faster. Ensure your engine is well warmed up when you reach the test centre.

User1998

Where are you located?

zorro262

Co.Roscommon