help with 4-2-1

1. user_50346 Regular Poster Joined: Feb 2011 Houghton-Le-Spring Posts: 366 C2 vts

   #1 4th September 2011, 13:51

   ive just bought a 4-2-1 manifold and it only has one hole for a sensor yet my car has two sensors, can i fit it with only one or will i have to tap it for the other one aswell ? thanks
2. shaneio Established Member Joined: Nov 2008 welwyn garden city, hertfordshire Posts: 2313 s1 106 xsi

   #2 4th September 2011, 14:12

   you can fit it with 1 lambda and get a lambda sleeve for the other, altho when i had a lambda sleeve on 1 a mechanic told me that i may aswell unplug it. hope this helps
3. user_39156 Infrequent Poster Joined: Nov 2009 Weston super Mare Posts: 189

   #3 4th September 2011, 14:20

   just get a sleeve
4. tingaling Frequent Poster Joined: Jan 2011 derby Posts: 992 Gold mk2 vtr

   #4 4th September 2011, 14:24

   Quote:

   Originally Posted by shaneio you can fit it with 1 lambda and get a lambda sleeve for the other, altho when i had a lambda sleeve on 1 a mechanic told me that i may aswell unplug it. hope this helps

   Must have been a stupid mechanic lol, unplugging it will tell the ecu there's a fault whereas sleeving it makes it read clean air tricking the ecu into thinking the cat is still present
5. user_50346 Regular Poster Joined: Feb 2011 Houghton-Le-Spring Posts: 366 C2 vts

   #5 7th September 2011, 15:19

   probablly a stupid question but what is meant by sleaving ?
6. S666UKH Frequent Poster Joined: May 2010 Ilford Posts: 558 Saxo Mk2 VTR, PUG 308

   #6 7th September 2011, 15:26

   http://www.kamracing.co.uk/citroen/c...leeve-m18.html
7. user_50346 Regular Poster Joined: Feb 2011 Houghton-Le-Spring Posts: 366 C2 vts

   #7 7th September 2011, 15:44

   so do you have to weld this to the mani ? or is the point of it to sleave ity and job done ? i have no idea about these things ha. thanks for your help
8. tingaling Frequent Poster Joined: Jan 2011 derby Posts: 992 Gold mk2 vtr

   #8 7th September 2011, 15:46

   You screw the second lambda sensor (if you have one) into it and tie it out the way to read clean air
9. user_50346 Regular Poster Joined: Feb 2011 Houghton-Le-Spring Posts: 366 C2 vts

   #9 7th September 2011, 15:46

   or do you put the sleeve on and just leave it ?
10. user_50346 Regular Poster Joined: Feb 2011 Houghton-Le-Spring Posts: 366 C2 vts

    #10 7th September 2011, 15:47

    got your reply after i had posted that, thanks for that, big help
11. tingaling Frequent Poster Joined: Jan 2011 derby Posts: 992 Gold mk2 vtr

    #11 7th September 2011, 16:55

    No problem mate
12. cullyvtr Newbie Joined: Sep 2011 ireland Posts: 11 fiesta :) , saxo vtr :)

    #12 7th September 2011, 17:20

    i have a 4-2-1 on my saxo , same problem as urs . just got a sleeve . and used the orther sensor in the mani . best of luck with it man
13. user_50346 Regular Poster Joined: Feb 2011 Houghton-Le-Spring Posts: 366 C2 vts

    #13 8th September 2011, 19:03

    thanks a lot big help
14. rick_VTR Saxperience Forum Bum Joined: Jun 2011 Abermule, Mid Wales. Posts: 2763 Corsa Rally Car & Fiesta ST

    #14 8th September 2011, 19:09

    you dont have to have a sleave, it wont affect anything it will just put your engine light on, if your not bothered with that then just unplug it mate.
    it wont affect the fueling or anything like that, the first sensor is the important one
15. RDKells Regular Poster Joined: May 2011 Northamptonshire Posts: 299 Silver Mk2 2001 VTR

    #15 8th September 2011, 23:36

    Forget having a new light on, I'm like a rabbit, I stare at lights. Not safe. Can't leave my car, once I open my door and that map light comes on I have to
    my battery goes flat then I have to charge my battery and the bastard thing comes back on again. Vicious circle :\
16. Tontsy Saxperience Addict Joined: Oct 2008 Plymouth, Fiddling - under a two poster ramp Posts: 14064 Audi

    #16 8th September 2011, 23:38

    dont waste money on having it sleeved, even if it is only 50p...just tie it out the way and your sorted.
    
    i never had any problems not sleeving mine.