Lambda with decat, interesting link

1. AL3X_ Established Member Joined: May 2010 Posts: 1434

   #1 8th August 2011, 01:41

   Found this link which says to make the ECU fuel correctly with a decat mani you should blank the first lambda hole and put the first lambda in the second hole, then sleeve the second lambda...
   
   http://c2club.co.uk/showthread.php?6...-lambda-sensor
   
   Is this true as my first lambda is in the first hole, with the second hole blanked off and a sleeve fitted to the second lambda
2. Vtr_Cam Frequent Poster Joined: May 2010 neath port talbot Posts: 984 Wicked Red VTR mk2

   #2 8th August 2011, 02:02

   Dont see why it would make a difference. Lambda reports to ecu, location of lambda wouldnt make a difference surely?
   
   Some decat manifolds only have one hole anyway
3. AL3X_ Established Member Joined: May 2010 Posts: 1434

   #3 8th August 2011, 02:43

   Thats what I thought mate, just thought id post it anyway....especially as since fitting mine the exhaust smells of unburnt fuel...cant complain at that smell though <3 lol
4. Vtr_Cam Frequent Poster Joined: May 2010 neath port talbot Posts: 984 Wicked Red VTR mk2

   #4 8th August 2011, 02:47

   Yeah when at a stand still or after turning the car off it stinks. Its all those emissions haha
5. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

   #5 8th August 2011, 10:52

   I'm going to try this tonight. I did have first lambda in first hole and second sleeved but ran like a bag of crap so ive put both back in and it's running smooth but drinking fuel. I'll try what the link says and report back
6. Quick Saxperience Post Whore Joined: Mar 2003 United Kingdom (England) Posts: 7064

   #6 8th August 2011, 10:55

   Only if you have a 2 lambda engine!
   
   First reads pre-cat second reads after the cat (so it should be cleaner air)
7. AL3X_ Established Member Joined: May 2010 Posts: 1434

   #7 9th August 2011, 01:19

   I do have a 2 lambda engine mate...i cant see why it would matter if it was plugged in which hole.
   
   Let us know how it goes mate...mine seems fine with 1st in 1st hole and second sleeved though.
8. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

   #8 13th August 2011, 01:10

   Done this today, car is MUCH smoother and idles like a brand new car
9. AL3X_ Established Member Joined: May 2010 Posts: 1434

   #9 13th August 2011, 01:35

   Seriously mate? Does it still pop, spit and bang though? Mines running perfect, and pops and bangs like mad...but is using a bit of fuel.
10. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

    #10 13th August 2011, 01:39

    Serious mate, runs much smoother uses less fuel too. It still pops and bangs because of the decat, but not as much as it used to because obviously now it's fueling properly lol. Do it mate it's definitly made a big difference on mine
11. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #11 13th August 2011, 01:45

    Hmmm I might have to try this then, I don't understand how it can make such a difference though with it just being like 30cm further down :/
    
    I was gonna see what it was like with both sensors plugged in but couldn't be arsed with the management light on lol.
    
    I might try swapping them over, don't really wanna lose the popping though i get popping on most gearchanges lol.
12. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

    #12 13th August 2011, 01:49

    Don't know how it makes a difference but it definitly does lol. Yeah mine pops on downshifts and sometimes on upshifts if i hit 5/5500k with foot flat down. You got a lambda blanking plug?
13. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #13 13th August 2011, 02:03

    Yeah I got a lambda blanking plug, basically at the moment my 1st lambda is in the 1st hole, the 2nd hole is blanked with a plug and the 2nd lambda sensor is in a sleeve I made, and it seems to run perfect and pops very often, just i seem to be sing a bit more fuel since fitting?
14. blakey260 Infrequent Poster Joined: Mar 2010 Rotherham/Sheffield Posts: 137 Ford Focus Zetec

    #14 13th August 2011, 18:16

    you know these lambda sleeves are they blocked off at the other end or just hollow? just my focus has 2 sensors and i've been after de-catting it for a while
15. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #15 13th August 2011, 20:24

    The ones you can buy are sealed...but i made one which wasn't out of a piece of pipe, it seemed fine but ive blocked it incase.
    
    As for the mpg...since fitting the mani ive just got 50 miles to a tenner from orange light to orange light...this was vpower and a mixture of mainly careful driving with some spirited blasts, is this good for a vtr or is the decat causing me to lose economy?
16. Barry123 Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS

    #16 13th August 2011, 20:30

    tenner could equal god knows how many litres.
    
    you tell me the litres you put in and I'll tell you your mpg.
17. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

    #17 13th August 2011, 21:51

    7.30 litres got me 58 miles today
18. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #18 14th August 2011, 00:48

    Quote:

    Originally Posted by adsayer tenner could equal god knows how many litres. you tell me the litres you put in and I'll tell you your mpg.

    I'll check next time I get petrol mate, gonna fill up next time though I just put atenner in to see how economical it was, i'll have to remember to watch how many litres it is
    
    

    Quote:

    Originally Posted by philliantkr 7.30 litres got me 58 miles today

    Ah I prosume mines roughly the same then, as a tenner of V-power is roughly that, I think I've got just over 50 miles so probably a little less than you. but not that noticable not sure whether to swap the plugs round as I want the popping lmao.
    
    What type of driving was yours out of interest?
19. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

    #19 14th August 2011, 01:20

    Swap the plugs round mate you will still get popping and your engine will run much smoother and its better for it trust me. Erm that's mainly hard driving if i drive normally i get just shy of 70 miles to a tenner which is 7.30l ish
20. logic_guy Saxperience Forum Bum Joined: Nov 2010 England Posts: 3423

    #20 14th August 2011, 01:31

    I never knew Saxo's had 2 lamba sensors.
    
    I've just bought a manifold (My cat is in the manifold). I'll have to try this out once i've got it all wrapped and fitted.
    
    What happens if you have no sensors fitted? Will the car be too rich?
    
    Tbh, i still get pops and gurgles with my sportex system anyway.
21. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

    #21 14th August 2011, 01:33

    It'll just run like a bag of crap with no sensors in and your EML light will more than likely come on. Pops and gurgles from a catback are different than pops and bangs from a decat lol
22. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #22 15th August 2011, 01:16

    Quote:

    Originally Posted by philliantkr Swap the plugs round mate you will still get popping and your engine will run much smoother and its better for it trust me. Erm that's mainly hard driving if i drive normally i get just shy of 70 miles to a tenner which is 7.30l ish

    I might when i'm next working on the car mate, tbh thought its running perfect...like absolutely spot on so I dunno if theres much point as I can't see it making that much difference being like 30cm further down when as standard its right at the top of the mani :/ Can't do any harm I suppose.
    
    

    Quote:

    Originally Posted by logic_guy I never knew Saxo's had 2 lamba sensors. I've just bought a manifold (My cat is in the manifold). I'll have to try this out once i've got it all wrapped and fitted. What happens if you have no sensors fitted? Will the car be too rich? Tbh, i still get pops and gurgles with my sportex system anyway.

    What manifold you go for mate? As said it will run like shit with no sensors fitted, have the EML light on, and be shit fuel consumption.
    
    Before my manifold I used to get pops and bangs but subtle ones, once you fit the manifold they are really loud pops a lot more often...and some even have like a spitting sound but dont think mines spat any flames i dunno.
23. Slugshead Established Member Joined: Jan 2009 Cardiff Posts: 1087 1.4 Red Westcoast Mk2 Posi Blue VTS

    #23 15th August 2011, 10:23

    Decat mk2 vts here
    
    Blanked it, EML light stayed off for a week and then came on
    Tried every combination of sleeving, etc..
    
    As the theory goes, if the second sensor reads fresh air, everything should be perfect..
    Didnt work at all..
    
    Just unplugged the second sensor and blanked the hole
    
    Just incase you were wondering, s/s mani + race section + Kamracing backbox along with GMC sleeve
24. Barry123 Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS

    #24 15th August 2011, 13:40

    The sleeve should work. I place a washer between the lambda and the sleeve on installation but with a little bit of lip balm to create a air tight seal.
    
    Try that, should work.
25. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #25 15th August 2011, 23:40

    Quote:

    Originally Posted by Slugshead Decat mk2 vts here Blanked it, EML light stayed off for a week and then came on Tried every combination of sleeving, etc.. As the theory goes, if the second sensor reads fresh air, everything should be perfect.. Didnt work at all.. Just unplugged the second sensor and blanked the hole Just incase you were wondering, s/s mani + race section + Kamracing backbox along with GMC sleeve

    Quote:

    Originally Posted by adsayer The sleeve should work. I place a washer between the lambda and the sleeve on installation but with a little bit of lip balm to create a air tight seal. Try that, should work.

    Thats weird, I used just a piece of pipe at first which was open at both ends and I had no problems with it...but as people said the lambda sleeve should be sealed I sealed the end of the pipe and then pushed some epoxy putty in the threaded bit to ensure an air tight seal....will get a sleeve when i get round to it though.
    
    This thread is more about positioning of the first sensor though, as link i posted is interesting but I can't see it making a difference tbh.
26. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

    #26 16th August 2011, 00:20

    Definitely made a difference on mine lol give it a try
27. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #27 16th August 2011, 00:58

    I keep meaning to but I've got that feeling where if its working well why change it lol...
28. Vtr_Cam Frequent Poster Joined: May 2010 neath port talbot Posts: 984 Wicked Red VTR mk2

    #28 16th August 2011, 01:15

    I have the kam racing sleeve on mine and its not sealed its open at then end. Had no issues or EML. I still cant see there beeing a difference. Its still reading the same air surely.
29. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #29 16th August 2011, 01:17

    Quote:

    Originally Posted by Vtr_Cam I have the kam racing sleeve on mine and its not sealed its open at then end. Had no issues or EML. I still cant see there beeing a difference. Its still reading the same air surely.

    Ah....I thought they were sealed hence why I sealed mine lol, whats the need for a sleeve then if they aint sealed?
    
    And yeah I cant understand a difference in positioning of the first ones but phillian says it does, maybe some don't react well to decatting?
30. Vtr_Cam Frequent Poster Joined: May 2010 neath port talbot Posts: 984 Wicked Red VTR mk2

    #30 16th August 2011, 01:20

    Quote:

    Originally Posted by AL3X_ Ah....I thought they were sealed hence why I sealed mine lol, whats the need for a sleeve then if they aint sealed? And yeah I cant understand a difference in positioning of the first ones but phillian says it does, maybe some don't react well to decatting?

    Just to protect the sensor i guess, i would have thought if it was sealed then it wouldnt be reading much clean air though.
    
    Maybe he had cleaned sensor when moving it and thats what it was, I just really cant see it working, especially since i only have 1 lmabda hole in my manifold anyway.
31. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #31 16th August 2011, 01:29

    Quote:

    Originally Posted by Vtr_Cam I have the kam racing sleeve on mine and its not sealed its open at then end. Had no issues or EML. I still cant see there beeing a difference. Its still reading the same air surely.

    Quote:

    Originally Posted by Vtr_Cam Just to protect the sensor i guess, i would have thought if it was sealed then it wouldnt be reading much clean air though. Maybe he had cleaned sensor when moving it and thats what it was, I just really cant see it working, especially since i only have 1 lmabda hole in my manifold anyway.

    True true thats what I thought,although sealed mine seems okay, i'm assuming it just reads the air trapped inside the sleeve when sealed lol.
    
    Yeh something like that, well my mani has two holes, one at the bottom of the branches and one in the downpipe, about 20cm away from each other, but even the first hole is further down than the original first hole in the standard manifold, so it must still be reading the same gas? Unless of course it read the amount of gas and being in one of the 2 brances now it reads half the amount it would in the downpipe or standard mani?
32. SI80 Regular Poster Joined: Jul 2011 NW Posts: 284 2001 saxo vtr silver/1999 1.1 eastcost

    #32 16th August 2011, 08:55

    I want to try this but i dont want to sound daft as anyone got any pics of where these are as on my 2001 vtr i can only see 1 lamb in the manifold ? .
33. Vtr_Cam Frequent Poster Joined: May 2010 neath port talbot Posts: 984 Wicked Red VTR mk2

    #33 16th August 2011, 09:15

    mk2 VTRs have one plugged in through exhaust heatshield (green sensor) and the other is plugged in manifold under the remote filter out of view(blue sensor)
34. SI80 Regular Poster Joined: Jul 2011 NW Posts: 284 2001 saxo vtr silver/1999 1.1 eastcost

    #34 16th August 2011, 09:25

    Thanks i dont have a heat sheald on the car and its got a straight pipe from the mani i can see the sensor in the pipe its about 20cm from the mani but there is not another one there so where will that be ? thanks
35. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

    #35 16th August 2011, 11:20

    Quote:

    Originally Posted by AL3X_ Found this link which says to make the ECU fuel correctly with a decat mani you should blank the first lambda hole and put the first lambda in the second hole, then sleeve the second lambda... http://c2club.co.uk/showthread.php?6...-lambda-sensor Is this true as my first lambda is in the first hole, with the second hole blanked off and a sleeve fitted to the second lambda

    I can understand if you removed the cat on a vtr or a jp4 type engine with cat close to manifold ,but keeping the std cast manifold
    that it wold run better ,as the probe is in a large chamber and removing the cat would drop prseeure in top of manifold ,so the probe would get pulses of gas .
    same goes for a probe fitted to only one half of a 4-2-1 manifold (seeing only 2 cylinders).
    I would guess that having further down the manifold the probe gets a more stable flow of gas and so gives a better average of total gas content .
    but it must always be the green probe on a 2 porbe car not the blue one .
    it could be it makes the car run slightly richer ,but if that produces more power ,then it could mean better use of the fuel and therefore you end up with better mpg .
    any cat will sap power and economy ,so combine the loss of cat with more stable sensor output and thats you the reason .
    best economy can be got at much leaner fuelling than that would give lambda 1 emissions ,but that produse other polutants ,thats why lambda1 is the std spec --emissions ,not economy
    I had a customer who was very economy biased and did lots of motorway mileage ,so we set his car to run at 16.5-1 ,which on his mondeo gave him +20% economy whilst at 75mph on the motorway ,but it did make it a little suttery on pickup ,mainly due to the type of confusing device we used --simple add on unit ,not a stand alone ecu ,which could have coped better ,but of course cost alot more
36. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #36 19th August 2011, 01:07

    Ah right, so with a 4-2-1 decat manifold I currently have the green sensor in the first hole nearest the block, the sensor hole further down is blanked off and the blue sensor sleeved...do you think I should relocate the green sensor to the second hole and blank off the first hole for best overall results, or leave as is?
    
    Thanks
37. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #37 6th September 2011, 23:43

    I've also noticed this recently:
    
    
    AS you can see the sensor hole on the raceland is right at the bottom, is this coincidence?
38. user_18250 Established Member Joined: Sep 2007 Swadlincote Posts: 1185 2003 Black VTR

    #38 7th September 2011, 14:51

    Quote:

    Originally Posted by AL3X_ I do have a 2 lambda engine mate...i cant see why it would matter if it was plugged in which hole. Let us know how it goes mate...mine seems fine with 1st in 1st hole and second sleeved though.

    
    Can't see why it would matter? The guy who posted above you just told you exactly why!
39. user_18250 Established Member Joined: Sep 2007 Swadlincote Posts: 1185 2003 Black VTR

    #39 7th September 2011, 15:02

    Quote:

    Originally Posted by AL3X_ I've also noticed this recently: AS you can see the sensor hole on the raceland is right at the bottom, is this coincidence?

    No this is the design and layout for most after market manifolds.
    
    Just one lambda port at the very bottom of the manifold.
    
    The first lambda plug goes into this hole and reads the dirty air coming out of the engine as it would in the top of a standard mani.
    
    The job of the second lambda is to read the air after it has been passed through a CAT, in which case would could expect the air to read much cleaner than before, and this proves the CAT is doing its job.
    
    If the second lambda is left to hang in the engine bay where they are no gases, the air here will read much cleaner by comparison to the first sensor which is in the exhaust, and the ECU will think the car is obeying all laws and hence worthy to drive on the roads.
    
    The other purpose of taking these two readings is that the ECU can constantly adjust the air/fuel mixture of the car to get the fueling close as possible as the lambda sensors will be telling whether too much or too little air is flowing out of the engine.
40. Thunderz Regular Poster Joined: May 2009 Newcastle Upon Tyne Posts: 253 Citroen Saxo VTS Throttle Bodied :) Citroen C2

    #40 7th September 2011, 15:38

    On my VTS the first sensor is in the first hole and the second sensor is just acting as a plug in the 2nd hole at the moment as It caught on a speed bump a while ago and ripped some of the wires apart. So I cut the wires completely free so it is not conected. EML light is on constantly but car seems to be running fine and can get around 320 miles from a tank. I am running a 421 ss piper manifold with a Decat and Magnex ss exhaust.
    
    Any thoughts??
41. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #41 7th September 2011, 18:55

    Quote:

    Originally Posted by SteveWC Can't see why it would matter? The guy who posted above you just told you exactly why!

    which guy?
    
    And to your next post...yeah i know about sleeving sensors etc...let me try explain a little better.
    
    On my car i have a 4-2-1 decat manifold which has two lambda holes for both the blue and green sensors, unlike the raceland which only has one hole.
    Currently I have the green sensor(originally first) which measures the gas content etc plugged into the first hole, the blue(originally second) sensor which checkc the cat is working properly is sleeved in the engine bay, and the second hole is blocked off.
    
    My question is should i move the green sensor into the second hole, block off the first hole and keep the second sensor sleeved, this will make my sensor in roughly the same place as on the raceland rather than being further up in one of the branches?
    
    I dont mean to sound a cunt but i couldnt work out if gmc was saying moving it would be helpful or not, as his mechanical explanations are clearly far above my understanding lol
42. Thunderz Regular Poster Joined: May 2009 Newcastle Upon Tyne Posts: 253 Citroen Saxo VTS Throttle Bodied :) Citroen C2

    #42 7th September 2011, 23:47

    Quote:

    Originally Posted by Thunderz On my VTS the first sensor is in the first hole and the second sensor is just acting as a plug in the 2nd hole at the moment as It caught on a speed bump a while ago and ripped some of the wires apart. So I cut the wires completely free so it is not conected. EML light is on constantly but car seems to be running fine and can get around 320 miles from a tank. I am running a 421 ss piper manifold with a Decat and Magnex ss exhaust. Any thoughts??

    
    Is this ok?
43. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #43 8th September 2011, 00:27

    If I were you I would get a new second lambda and sleeve it mate, as for whether you keep the knackered sensor as a blank or buy a proper blank is up to you, it will be fine either way but deffo get a sensor and sleeve it.
    
    Anyone help me with my last post?

    1 user thanked this post: Thunderz
44. Thunderz Regular Poster Joined: May 2009 Newcastle Upon Tyne Posts: 253 Citroen Saxo VTS Throttle Bodied :) Citroen C2

    #44 8th September 2011, 13:12

    Quote:

    Originally Posted by al3x_ if i were you i would get a new second lambda and sleeve it mate, as for whether you keep the knackered sensor as a blank or buy a proper blank is up to you, it will be fine either way but deffo get a sensor and sleeve it. Anyone help me with my last post?

    thanks alot mate.
45. Slugshead Established Member Joined: Jan 2009 Cardiff Posts: 1087 1.4 Red Westcoast Mk2 Posi Blue VTS

    #45 8th September 2011, 18:42

    the sleeving doesnt work..
    
    In theory, if your second lambda sensor reads clean air, then the CAT is doing its job amazingly right..
    
    EML still comes on even with fresh air being read..
    
    I unplugged mine in the end and sold the GMC sleeve..
    
    no diff in fueling, the light only comes on becuase it thinks there may be something wrong
46. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #46 9th September 2011, 02:22

    Quote:

    Originally Posted by Slugshead the sleeving doesnt work.. In theory, if your second lambda sensor reads clean air, then the CAT is doing its job amazingly right.. EML still comes on even with fresh air being read.. I unplugged mine in the end and sold the GMC sleeve.. no diff in fueling, the light only comes on becuase it thinks there may be something wrong

    
    wrong, mine is fine sleeved and no eml light, I hear some people have had trouble though...did you get your eml light reset after sleeving and driving for a bit?
47. steve89_vtr L-plater Joined: Aug 2011 Cheadle Hulme Posts: 44 Saxo VTR

    #47 9th September 2011, 18:48

    Anyone have a link to where i can get these sleve's from ???
    ste
48. RyanBurrows19 Infrequent Poster Joined: Nov 2010 Mansfield Posts: 179 2003 Citroen Saxo Furio 1.4

    #48 10th September 2011, 18:24

    I'm having big trouble with my lambda's I have raceland with one hole came with sensor already in I've plugged that into the green connector and got hold of another sensor off eBay and plugged that into the blue connector my car has eml light on it's been reset x4 and still comes on it's down on power and is not fueling right at all
    
    I need help on what to do please
49. steve89_vtr L-plater Joined: Aug 2011 Cheadle Hulme Posts: 44 Saxo VTR

    #49 10th September 2011, 18:31

    Quote:

    Originally Posted by RyanBurrows19 I'm having big trouble with my lambda's I have raceland with one hole came with sensor already in I've plugged that into the green connector and got hold of another sensor off eBay and plugged that into the blue connector my car has eml light on it's been reset x4 and still comes on it's down on power and is not fueling right at all I need help on what to do please

    If the car was ok before hand then maybe the sensor that was already in the manifiold is a faulty one ???
    ste
50. Slugshead Established Member Joined: Jan 2009 Cardiff Posts: 1087 1.4 Red Westcoast Mk2 Posi Blue VTS

    #50 10th September 2011, 18:36

    Quote:

    Originally Posted by AL3X_ wrong, mine is fine sleeved and no eml light, I hear some people have had trouble though...did you get your eml light reset after sleeving and driving for a bit?

    Yeah got it reset twice lol, got angry sold the sleeve..
    
    Got fed up so put standard zorst back with both sensors in. meh..
51. RyanBurrows19 Infrequent Poster Joined: Nov 2010 Mansfield Posts: 179 2003 Citroen Saxo Furio 1.4

    #51 10th September 2011, 18:55

    im thinking if i cant get it sorted i should just put cat back on!
52. user_18250 Established Member Joined: Sep 2007 Swadlincote Posts: 1185 2003 Black VTR

    #52 10th September 2011, 23:55

    Quote:

    Originally Posted by AL3X_ which guy? And to your next post...yeah i know about sleeving sensors etc...let me try explain a little better. On my car i have a 4-2-1 decat manifold which has two lambda holes for both the blue and green sensors, unlike the raceland which only has one hole. Currently I have the green sensor(originally first) which measures the gas content etc plugged into the first hole, the blue(originally second) sensor which checkc the cat is working properly is sleeved in the engine bay, and the second hole is blocked off. My question is should i move the green sensor into the second hole, block off the first hole and keep the second sensor sleeved, this will make my sensor in roughly the same place as on the raceland rather than being further up in one of the branches? I dont mean to sound a cunt but i couldnt work out if gmc was saying moving it would be helpful or not, as his mechanical explanations are clearly far above my understanding lol

    Ah I see exactly what you're saying.
    
    Probably better to put it in the second hole yes as it will be further away from the engine meaning it will see less heat, should just make it easier to remove it you ever need to. Not really necessary if you can't be bothered.
    
    The manifolds that only have one hole have it right where it joins the centre pipe so furthest hole should be an ideal place really but as said won't matter to the way the car runs will just mean it comes out easier lol.
53. Silky Frequent Poster Joined: Oct 2006 Chelmsford, Essex Posts: 674 MK1 Venetian Red VTR

    #53 11th September 2011, 16:06

    I've got a decat going on this week, doesn't have a hole for my second lambda
    
    Unsure whether to unplug it or sleeve it.
    
    For the People that have used a sleeve, where did you put the sensor, did you put it in engine bay or hook it up underneath the car somewhere?
54. AL3X_ Established Member Joined: May 2010 Posts: 1434

    #54 12th September 2011, 01:58

    Quote:

    Originally Posted by SteveWC Ah I see exactly what you're saying. Probably better to put it in the second hole yes as it will be further away from the engine meaning it will see less heat, should just make it easier to remove it you ever need to. Not really necessary if you can't be bothered. The manifolds that only have one hole have it right where it joins the centre pipe so furthest hole should be an ideal place really but as said won't matter to the way the car runs will just mean it comes out easier lol.

    Yeah I reckon i'll move it when I get a chance, just dont want it to pop less lmao, GMC said its a good idea to move it as it will be in a more high flow of gas to get better readings.
    
    

    Quote:

    Originally Posted by Silky I've got a decat going on this week, doesn't have a hole for my second lambda Unsure whether to unplug it or sleeve it. For the People that have used a sleeve, where did you put the sensor, did you put it in engine bay or hook it up underneath the car somewhere?

    deffo sleeve it or your EML will be on and may put the car in limp mode, you can cable tie the senor to near the battery tray.