Emissions

[owenreme]

had my MOT done today, the emissions where way high, the bloke said theres too much fuel coming through!!!

 

still passed thanx to the friendly mechanic

 

any ideas on whats wrong with the car, my cars a jspec TT with a nur spec exhaust

[tbourner]

Check the OX1 pin?

 

You need a DVM of some kind.

On the inlet side of the engine next to the manifold and the cam cover, at about pot 3 kind of area, there's a black plastic cover with Diagnostic Port written on it.

 

Open that and measure with the DVM from a good ground point to the pin called OX1 (it's shown where it is on the underside of the cap).

 

Apparently it should read between 0.4v and 0.7V. Mine and I've read some others say thiers drop intermittently to 0 as well but according to Ian that's wrong!!

If it's over 0.7 then it's overfuelling but probably won't be able to get above 0.8V as it's narrowband.

 

You could reset the ECU first as well, and drive it about for 100 miles or so just to make sure it's learnt.

[Guru]

Reset the ECU

[owenreme]

cheers ill have a go!!

[Nic]

Most probably a worn out O2 sensor, if it hasn't been changed for a while. I've just completed a group buy on O2 sensors, but i can still get them at a big saving over UK prices if needed.

 

Let me know if i can help.

[Supragoose]

what about changing the charcoal canister?? would that help at all

[Supragoose]

im having the same problem,high hc mon emissions...carbon monxide is way low...but the other is high...would changing the charcoal canister help in anyway