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Old 22-01-05
Lille-Twinny
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Help 155 @MOT. Help!

Ok, so I have a 155 1.8 TS 92/93 model in Spain. And now it was time to take it to MOT, isn't that where you go for an techical search on the car so you're allowed to drive it another year or so??

Anyway, they've changed a lambda probe, but here's the result:

CO2 = 0,67
Sould be about 0.2 or something? What can be wrong? Can it be the cat? My parent's drive it now, and have been to a workshop who said they had to change the cat = €600. Argh. I work at a car company but I though that you only changed the cat when it was loose inside...

Anybody have any idea what I can do?? Is the only solution to buy a new cat?

Regards
Kjetil.
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  #2 (Post Link)  
Old 22-01-05
wrinx
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Re: 155 @MOT. Help!

Did you take the car for a good long run before the test (10-15km)? You need to get the cat up to temperature before the test.

wrinx
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Old 22-01-05
Lille-Twinny
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Re: 155 @MOT. Help!

Yeah, the place they take the car is about 30 km away, so I think the cat is warm and everything. I don't know what to do now. Argh. The problem is that the car stands still for maybe 40 weeks a year, and this year I was going to bring it home to Norway, but it's not legal to sell it and import it to Norway if it's not in order....

Oh, by thw way check this out:

http://www.humor911.com/art.aspx?artID=1301

It's in norwegian and says saomething like:
Where do BMW get their inspiration?
Hahahaha
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  #4 (Post Link)  
Old 22-01-05
wrinx
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Re: 155 @MOT. Help!

LOL....my kind of humour

Try some injector cleaner when there's not much fuel in the tank..another possiblity might be the water temp sensor causing it to run rich.

edit......long run and HARD drive to really clean it out Also....how old is the petrol?

wrinx
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Old 24-01-05
Ralf S.'s Avatar
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Skinny 155v6 ICBM

Re: 155 @MOT. Help!

It could be the thermostat has seized up a bit while it's hanging around - that'll make it run cold/rich.

I doubt the cat would just die, unless your parents have been putting leaded gas in there (probably unlikely as the pump nozzle won't fit).

I'd check the Lambada probe too, before buying a new catalyser.

Ralf S.
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  #6 (Post Link)  
Old 24-01-05
ChrisS's Avatar
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166 3.0 Sporto

Re: 155 @MOT. Help!

...and don't forget the lambda heater fuse & relay..........
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  #7 (Post Link)  
Old 24-01-05
Lille-Twinny
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Re: 155 @MOT. Help!

Thank you SO much for answers, guys! I'll talk to them tomorrow and see what they say about temeprature (wich I remember is pretty cold)

The lambasensor is new, but been thinking that if it's been giving wrong readings over a period of time the catalyster will eventually be destroyed... Right?

I'll tell them to take it out on a really, really hard spin. And also put some injector cleaner in it.

Regards
Kjetil
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  #8 (Post Link)  
Old 24-01-05
wrinx
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Re: 155 @MOT. Help!

Originally Posted by Kjetil
The lambasensor is new, but been thinking that if it's been giving wrong readings over a period of time the catalyster will eventually be destroyed... Right?

Regards
Kjetil
Not necessarily....go for the clean and blast first

wrinx
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  #9 (Post Link)  
Old 25-01-05
ChrisS's Avatar
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Re: 155 @MOT. Help!

CAT will most likely be fine as Wrinx says. My V6 was running with problems for many, many miles without upsetting the CAT.

Once the problem was solved, the emissions returnd to normal immediately.
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