Mot Failer - Emmisions

[havantascooby]

These Galaxys have some querks!

 

My Galaxy Aspen N reg 2.0 has just failed its mot for emmisions (massively over the top - off the scale) I had a new Lambda sensor fitted and it reduced the emmisions to abot 6.0 (3.0 required). I have now been told get a new Catalytic converter (around

[El Dingo]

Please accept my consolation. :rolleyes:

 

The cat/exhaust change isn't too hard - but would be much easier on a ramp. I wouldn't recommend doing this at home unless you can get a good 'swing' at it. At the very least you need the car up on ramps rather than axle stands. The car must be well supported and very secure if you are underneath! If the exhaust is corroded, it'll be hard to separate, so there will be lots of pulling and pushing...

[seatkid]

I hope you didnt buy a "universal" lambda probe from a motor factors. IIRC they don't seem to work properly in a Galaxy and you need a genuine/OEM unit for the emissions to come right down. Try a search for lambda for further information.

 

I don't know why you want to use high viscosity oil - is it burning oil?

 

For all petrol engine cars (not just Galaxys) the important parts are a clean air filter, and spark plugs / ignition leads that are in good condition. I'm not sure if the 2.0 litre has egr (exhaust gas recirculation), but if it has that could also effect emissions.

Edited August 13, 2007 by seatkid

[mumof4]

All i know about the cat from what i have read..is that you mustnt hit it or bang it or drop it.

[Neils TDi again]

As seatkid has said if its a none OEM lambda sensor there have been many issues regarding the ability of the ecu to correctly sense and therefore adjust the mixture of fuel air and this will result in huge emmisions.

 

The high visco oil is also a possiblity you should stick to the standard oil as this can generate unusual engine burn conditions, also the coil packs may be now running slow causing late burn and high emissions this would also make the engine sound tappety as the burn occurs during the transition of the valves in their cycle and there for more emmisions.

 

Basically all you have done and more, air oil filters and fresh oil along with an OEM sensor may resolve your issues.

[insider]

I'm not sure if the 2.0 litre has egr (exhaust gas recirculation), but if it has that could also effect emissions.

 

It has both EGR and secondary air injection for emissions control.

[havantascooby]

Thanks for all your suggestions

 

It passed its MOT today hurray!!! only just though

 

Fitted the new catylitic converter and that seem to have done the trick - marginally

 

But from the other posts here i think that the main culprit could have been the universal lambda sensor - this massively reduced the gases but only to double the amount - i wish i found this site a week ago

 

My electical problems may have been a result of frayed wires in the door protection shrouds (the boot in my case) as other threads have stated. I have taped them all up and will advise on effectiveness in the next few days.

 

The engine is burning a bit of oil and it is blowing back into the air filter but not too much

 

 

Neil Wiles (or anybody who knows) Please tell me more of these coil packs running slow possibly causing the tapping noise - i would love to get rid of that tapping noise my car sounds like a diesel. Is this the standard coil and HT leads or something completely different (cost, ease of fitting etc would be helpful)

 

Any sucesses i have i will report back into the forum

 

Thanks for all your help

 

PS the yeti game in the arcade is cool

[tiny]

A common fault causing high emmision MOT failures is the secondary air pump itself, there a a few posts on here about it already. Do you hear the pump spin for about 2 mins from a cold start up?

 

If not the pump could have failed and the ECU will be giving incorrect signals causing higher than normal emmisions (delivering more/less fuel, advanced/retarded ignition timing etc) theres an interesting post on here about replacing the pump with a bulb to fool the ECU into thinking there is a load on the circuit.

 

Found it here you go. Click me

Edited August 14, 2007 by tiny