decat

1. probe200 L-plater Joined: May 2008 Fareham/Portsmouth Posts: 98 saxo westcoast

   #1 30th November 2008, 22:14

   i read that having a decat makes the engine run rich which messes with the lambda sensor and ruins fuel economy? whats your experience..
2. Ferg Saxperience Forum Bum Joined: Jun 2007 Maidstone, Kent Posts: 4928 Clio 197 Cup

   #2 30th November 2008, 22:27

   Since i've had my de-cat fitted my fuel economy has been fine ... if not slighty better on longer journeys. Although I did have a problem with my second Lambda Sensor a few months back, which could well have been down to the De-Cat.
3. user_10418 Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..

   #3 30th November 2008, 22:57

   Quote:

   Originally Posted by probe200 i read that having a decat makes the engine run rich which messes with the lambda sensor and ruins fuel economy? whats your experience..

   Mines been spot on!! and sounds mint too............very good buy....
4. user_21524 Established Member Joined: Feb 2008 wirral Posts: 2087 saxo vtr mk2

   #4 30th November 2008, 23:00

   just need to get a manifold now saxo kid
5. user_10418 Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..

   #5 30th November 2008, 23:02

   Quote:

   Originally Posted by dobbo_1 just need to get a manifold now saxo kid

   Got supersprint on order now............ will be any day now coming......................
6. user_21524 Established Member Joined: Feb 2008 wirral Posts: 2087 saxo vtr mk2

   #6 30th November 2008, 23:06

   wooop finaly
7. user_10418 Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..

   #7 30th November 2008, 23:07

   Quote:

   Originally Posted by dobbo_1 wooop finaly

   Yer ,got silver vts now as well to play with...........
8. user_21524 Established Member Joined: Feb 2008 wirral Posts: 2087 saxo vtr mk2

   #8 30th November 2008, 23:11

   i want a vts going to get one in the summer
9. Shak Infrequent Poster Joined: Aug 2008 Bournemouth Posts: 176 saxo vts 106 xsi

   #9 30th November 2008, 23:12

   lambda's before the cat, so it won't change what it reading.
10. user_10418 Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..

    #10 30th November 2008, 23:13

    Quote:

    Originally Posted by dobbo_1 i want a vts going to get one in the summer

    Get one now!!!
11. tobomoto Established Member Joined: Apr 2008 Essexshire Posts: 1885 zx7r, 28 seater optare

    #11 1st December 2008, 18:07

    i think its done somthing to the fuelling on mine by decatting it. thats why im going back to standard...
12. don55 Established Member Joined: Feb 2004 southampton United Kingdom (England) Posts: 1881 Super stripped VTS transit camper iveco work hor

    #12 1st December 2008, 18:12

    lmao @ the fuelling answers
    
    the lambda sensor, which in my experience does fuck all on a narrow band anyway, sits BEFORE the cat so how removing the cat changes how the engine runs is beyond me.
    
    id like to be told other wise though
13. tobomoto Established Member Joined: Apr 2008 Essexshire Posts: 1885 zx7r, 28 seater optare

    #13 1st December 2008, 18:42

    on a mk 2 vtr there are 2 sensors, 1 before the cat, 1 after it. it controlls the fuel mixture, which is the problem im having. on the mot at 3000 rpm the max allowed co2 is <0.2. mine was 15.8- overfuelling badly.
14. don55 Established Member Joined: Feb 2004 southampton United Kingdom (England) Posts: 1881 Super stripped VTS transit camper iveco work hor

    #14 1st December 2008, 18:44

    is that with cat in manifold ? i think i remember that acutaly as my mate had a 1.1 with that manifold.
    
    im jsut too old skool, well done though.
15. tobomoto Established Member Joined: Apr 2008 Essexshire Posts: 1885 zx7r, 28 seater optare

    #15 1st December 2008, 18:50

    yeah its the one with the cat in the manifold mate. am i right in thinking the mk2 vts only has one sensor?
16. probe200 L-plater Joined: May 2008 Fareham/Portsmouth Posts: 98 saxo westcoast

    #16 1st December 2008, 19:17

    so basically most people are fine,
    
    i found where i read it: CAR Mechanics mag october 2008
    
    "What makes matters worse is when owners have a go at tuning their cars by removing the cat. The car will then run far to rich and subsequently contaminate the lambda sensor."
    
    thanks for the feed back, supersprint race system sounds like a nice crimbo pressy haha
17. don55 Established Member Joined: Feb 2004 southampton United Kingdom (England) Posts: 1881 Super stripped VTS transit camper iveco work hor

    #17 1st December 2008, 19:21

    not sure on the VTS, ive only ever owned mk1's. well mk1 engined cars anyway
18. probe200 L-plater Joined: May 2008 Fareham/Portsmouth Posts: 98 saxo westcoast

    #18 1st December 2008, 19:22

    ah mines only a mk1 westcoast, sont know if that makes a difference?
19. user_10418 Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..

    #19 1st December 2008, 22:17

    Quote:

    Originally Posted by probe200 ah mines only a mk1 westcoast, sont know if that makes a difference?

    Never had any probs as yet on my mk2 vts...........
20. probe200 L-plater Joined: May 2008 Fareham/Portsmouth Posts: 98 saxo westcoast

    #20 2nd December 2008, 14:25

    Quote:

    Originally Posted by saxokid100 Never had any probs as yet on my mk2 vts...........

    cool, its nice to know im not going to ruin my 425 miles to a tank haha
21. AlexBp West Midlands Joined: Dec 2007 West mids Posts: 23149 Supra,civic GL

    #21 2nd December 2008, 14:31

    simple answer when decatting twin lamda cars is to sleeve the second lamda sendor
    get a supersprint plug off cam
    and a sleeve off gmc
    little bracket is easy to make to hold the sleeve job done
    
    means the second lamde reads clean air as it should so it doesnt adjust the fuelling
22. forbessid Frequent Poster Joined: Jun 2006 Cheshire Posts: 621 mk2 Icelandic Vts.

    #22 11th December 2008, 09:02

    the problem you will have sometimes with de-catting the mk2 vts is that your engine management light will come on,also its a pain in the arse when it comes to the mot cos you need to put the cat back on for a pass.
23. Shak Infrequent Poster Joined: Aug 2008 Bournemouth Posts: 176 saxo vts 106 xsi

    #23 11th December 2008, 17:56

    Why do people whinge about putting the cat back in come m.o.t time, it take longer jacking the car up than it does to swap the pipe.
24. JamesRm Forum Section Moderator Joined: Aug 2008 Liverpool Posts: 15517 Saxo VTR

    #24 11th December 2008, 17:57

    av never heard of a de cat doing things liike that.