hello again my c220 has failed m.o.t on

[beckham7]

emmissions any ideas on why its running so high?
thankyou

 

[Spencer]

As a total non-techy I can't say, but I noticed a big change in my car when I started using a fuel conditioner - the firepower pill. It was recommended by a friend as increasing fuel economy. I didn't notice much of that, but I used to get black smoke whenever I started my car and that's totally vanished.

 

[beckham7]

cheers mate,but the fella said it must go on the comp at mercedes to sum up the problem

 

[dieselman]

Try a dose of injector cleaner before anything else and check things like the air filter and split vacuum pipes.

After that it is probably a duff sensor such as engine temperature or the Lambda sensor in the exhaust.

What exactly were the readings?

 

[beckham7]

thanks mate,te readins where co 0.7(0.5)
co 2500 0.6(0.3)
hc 128 (100)
lambda 1.01 (0.97-1.03)
the last one looks ok but the 3 above are a tad too high

 

[dieselman]

Your engine is running too rich a mixture (Co), which is pushing up the Hc.

Give it a strong dose of injector cleaner and a good thrash. Failing that the cat may be getting a bit tired.

 

[beckham7]

thankyou mate
hope it aint the cat
i,ll let you know how it goes
i,ve a month to get it right anyway

 

[beckham7]

took it to mercedes and the cat is fooked(tottally empty) :evil:
£800 they quoted :twisted:
so i,m gonna get one of them universal ones and weld it on myself(£100)
130k miles so cant really complain
cheers all for advice :lol:

 

[beckham7]

these universal cats are top lads
if yo have a problem wit your cat
put 1 off these on cost m £100 took 1 hour max with welding :lol: as good if not better than a new one
i,m a happy man now what shall i do with the £ i saved :twisted: :wink: