quick answer needed

Fri Oct 23, 2009 12:51 pm

my car failed on emissions by 48% on co level will changing spark plugs cure the problem?

Fri Oct 23, 2009 1:01 pm

Unlikely, it may help but it won't get rid of that much crap from the exhaust.

Fri Oct 23, 2009 1:02 pm

what will help removing the crap?

Fri Oct 23, 2009 1:09 pm

how dirty is the air filter??

Fri Oct 23, 2009 2:47 pm

Does your car smoke at all?? mine did i i assume it was the valve stem oil seals which is quite an in depth and costly job so i just dropped a new engine in before the MOT

Fri Oct 23, 2009 4:22 pm

the air filters clean and the car does smoke a little bit at first but when its warmed up it stops

Fri Oct 23, 2009 6:04 pm

beamer-boi wrote:the air filters clean and the car does smoke a little bit at first but when its warmed up it stops

Give it a good spirted blast before the Mot.

Fri Oct 23, 2009 6:06 pm

What engine is it?

Fri Oct 23, 2009 6:10 pm

M20 I think n I jus changed the spark plugs and it runs alot better

Fri Oct 23, 2009 6:16 pm

Maybe have a look in the distributor cap and give it a CAREFUL clean of the contacts. The stronger the spark is,the better the burn will be...

Sat Oct 24, 2009 12:46 am

they told me at the mot station to put some petrol cleaner in with my petrol n tht would improve emissions but i dno whether it is worth it eny1 tried it if so wots the outcome?

Sat Oct 24, 2009 12:56 am

At 48% fail it'll probably take more than that to fix it.
You need to address all the service items, and as Will said,the blue temp sensor too needs checking too.
Don't give up,but don't think this'll go away easy either....

Sat Oct 24, 2009 1:07 am

48% ?!8O According to the Haynes manual, a 325i should have between 0.5-1.5% CO !

Something must be way adrift. I'd check the usual service items, then the compression of each of the cylinders to see if the valves/piston rings are leaking.

It could also be worn injectors - see the Zone Wiki on how to clean them:

http://www.e30zone.net/e30zonewiki/inde ... _injectors