Emissions trouble..

1. marty80 Regular Poster Joined: Feb 2012 Posts: 363

   #1 24th October 2012, 16:11

   Hi there all,
   
   Im currently having trouble with the car psssing emissions for the mot..
   
   i have a 421 mani with the catalyst to powerflow exhaust.
   
   i have only the one lambda sensor on will this be a prob as i was told it should only need the one fitted?
   
   Cheers any helo would be appreciated
2. jasonmayall Established Member Joined: Mar 2011 Birmingham Posts: 2148 Rover BRM, Rover 800 Coupe, Mk6 golf.

   #2 24th October 2012, 16:37

   Dont mean to sound like a bellend lol, but you do have a CAT in there dont you?
   What manifold is it? is it a sports cat you've got?
   MK1 or MK2?
3. marty80 Regular Poster Joined: Feb 2012 Posts: 363

   #3 24th October 2012, 16:59

   yes there is a cat fitted, ive got a 421 manifold, cat & powerflow exhaust
   
   my vts is a mk2 but im only running with 1 lambda sensor frm the manifold
   
   do i need both lambda senors before i can pass the mot?????
4. Bedford126 Saxperience Post Whore Joined: Jul 2010 Morley, Leeds Posts: 8469 Civic ep3 type r powered by TDI NORTH

   #4 24th October 2012, 17:07

   No only one lambda is needed mate the second is only to sense the clean air after the cat. The second lambda however should be sealed and sleeved so it cant sense anything.
   
   Also how old is the cat and have you tried a quality fuel system cleaner such as forte or castrol with a long drive to burn all the shite from the cat?
5. Pricklep Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5

   #5 24th October 2012, 17:09

   what year is it? my mk2 vts has a lambda sensor in the mani and one just after the cat.
   
   Mine passed the emissions fine with the OE mani>cat>supersprint catback 2" supersprint few months ago.
6. marty80 Regular Poster Joined: Feb 2012 Posts: 363

   #6 24th October 2012, 17:20

   well ive had the motor in for the mot but i failed on high carbon monoxide's. I was told the second lambda would be needed, you's reckon i need a new lambda or should i fit the second one behind the standard catalyts??
   
   the car hasnt any engine management lights on so there for im thinking the first lambda should still be working.. yet again the car is running shitie on idle..
7. marty80 Regular Poster Joined: Feb 2012 Posts: 363

   #7 24th October 2012, 17:21

   sorry for got to add. my saxo's a 51 plate Mk2
8. Bedford126 Saxperience Post Whore Joined: Jul 2010 Morley, Leeds Posts: 8469 Civic ep3 type r powered by TDI NORTH

   #8 24th October 2012, 17:24

   Quote:

   Originally Posted by marty80 sorry for got to add. my saxo's a 51 plate Mk2

   Put the second lambda back in. Then get yourself a decent fuel system cleaner such as forte or castrol. and run the car for about 30 miles and get it good and hot then go for your re-test whilst the cat is red hot.
9. marty80 Regular Poster Joined: Feb 2012 Posts: 363

   #9 24th October 2012, 17:26

   will give that a try & hopefully it will pass
   cheers mate
10. user_12874 Frequent Poster Joined: Dec 2006 London, England Posts: 734 Saxo VTS, Audi A6 Avant Quattro.

    #10 25th October 2012, 11:40

    Marty80, you don't need the second "lambda" sensor, mind just passed without. (I dont even have the sensor on the car)
    
    If lamba is not out on reading, check for leaks in exhaust low oil in engine, if not then likely to be the cat. How old is it?
11. marty80 Regular Poster Joined: Feb 2012 Posts: 363

    #11 25th October 2012, 12:38

    alright there bytor,
    
    I did have the same cat on last year for MOT and it passed fine. Engine oil is fully topped up as i just fitted a new 3 layer head gasket and a set of 743 catcams.. I was told this wouldnt affect emissions on the mot without a remap.. here mate does it matter which plug the first lambda sensor plugs into?? both connectors for the lambdas are the same.. cheers bytor
12. user_12874 Frequent Poster Joined: Dec 2006 London, England Posts: 734 Saxo VTS, Audi A6 Avant Quattro.

    #12 25th October 2012, 14:04

    Prob easier with a picture:
    
    
    
    Click the link if you need it bigger
    
    http://scott.omg.li/car/IMG-20120415-00025.jpg
    
    Was lambda out on emmission?
    
    How much was co2 out by?
    
    Don't know if the cams would cause the car to fail emissions, wouldn't have thought so. Maybe if it was running rough on idle, fast idle test should pass though.
13. marty80 Regular Poster Joined: Feb 2012 Posts: 363

    #13 25th October 2012, 20:03

    i have 2x plugs for lambda's mate. 1 for the top of the standard manifold and 2nd thats fitted after the cat.. why are both connectors coloured the same? also the fail sheet never had the co2 levels. Was wondering, do both lambda's do there seperate jobs as i may have them connected wrongly? cheers
14. marty80 Regular Poster Joined: Feb 2012 Posts: 363

    #14 26th October 2012, 23:12

    fitted both lambdas and the co2 are still to high.. would a leak on the exhaust make the levels higher???
    
    Cheers lads
15. marty80 Regular Poster Joined: Feb 2012 Posts: 363

    #15 26th October 2012, 23:22

    or might this be the fse boost valve thats fitted giving me troubles? anyone have a good tip on setting up the fse boost valve proper..? or is there a standard setting from the close possition??