Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: MOT = Good news

  
  1. #1
    Status
    Offline
    Teejay's Avatar
    AstraSport Member
    Join Date
    Sep 2005
    Posts
    6,383
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    MOT = Good news

    Had my second MOT this morning. Passed with no advisory or noted points

    Just a couple of things that I noticed that pleased me:

    Braking Force applied for Astra Front Disc = 280Lb/ft Mine = 300
    Braking Force applied for Astra Rear Disc = 180Lb/ft Mine = 210
    Braking Force applied for Astra Hand Brake = 150Lb/ft Mine = 170

    So the brakes are all good (that's with standard discs and EBC Green Stuff Pads)

    In the emissions test I was also quite pleased:
    Fast Idle
    CO % allowed = 0.200 Mine = 0.002
    HC ppm allowed = 200 Mine = 7
    Natural Idle
    CO % allowed = 0.300 Mine = 0.000

    If only car tax was done on a per vehicle rate, rather than on the car model I'd be laughing!!

    The only bit I don't understand is the "Lambda" reading
    It says Min = 0.970 Max = 1.030 Mine = 1.030
    What does this mean? Can I adjust something to make it less, or is this fine as it is?
    0-60 in 6.5 secs and 48mpg- winner!

  2. #2
    Status
    Offline
    coupekris's Avatar
    AOC Newbie
    Join Date
    Oct 2006
    Posts
    20
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Can't adjust anything on your lambda sensor but as its passed on the emmisions etc i wouldn't worry

  3. #3
    Status
    Offline
    Ruperts Trooper's Avatar
    AOC Obsessed
    Join Date
    Dec 2005
    Posts
    1,471
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Quote Originally Posted by Teejay
    Fast Idle
    CO % allowed = 0.200 Mine = 0.002
    HC ppm allowed = 200 Mine = 7
    Natural Idle
    CO % allowed = 0.300 Mine = 0.000

    If only car tax was done on a per vehicle rate, rather than on the car model I'd be laughing!!
    Car tax is based on CO2, the Mot tests CO.

    Your Astra's just working well, the cat is converting virtually all CO in the exhaust ports to CO2 to go down the exhaust.
    Maintains:- Vectra Design 1.9CDTi
    Drives :- Hyundai Santa Fe


  4. #4
    Status
    Offline
    Ruperts Trooper's Avatar
    AOC Obsessed
    Join Date
    Dec 2005
    Posts
    1,471
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Quote Originally Posted by Teejay
    The only bit I don't understand is the "Lambda" reading
    It says Min = 0.970 Max = 1.030 Mine = 1.030
    What does this mean? Can I adjust something to make it less, or is this fine as it is?
    This means that your engine is running at it's limit. Next year you'll fail the MOT if your lambda goes above 1.030. It should idealy be 1.000
    Maintains:- Vectra Design 1.9CDTi
    Drives :- Hyundai Santa Fe


  5. #5
    Status
    Offline
    Ruperts Trooper's Avatar
    AOC Obsessed
    Join Date
    Dec 2005
    Posts
    1,471
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Sorry for the multiple posts, I keep getting interrupted.

    At last MOT, 76000 miles, my X18XE1 (absolutely standard) gave:-

    Fast Idle - CO 0.00%, HC 0ppm, lambda 1.003
    Natural Idle - CO 0.00%

    These figure reflect the lack of wear through using Mobil1 0W-40
    Maintains:- Vectra Design 1.9CDTi
    Drives :- Hyundai Santa Fe


  6. #6
    Status
    Offline
    Teejay's Avatar
    AstraSport Member
    Join Date
    Sep 2005
    Posts
    6,383
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Ok so I need to replace the Lambda? or do I need to fix whatever is causing the reading to go higher to stop it going higher? or both?

    and what is it a reading of? what exactly is lambda = 1.000 ??
    0-60 in 6.5 secs and 48mpg- winner!

  7. #7
    Status
    Offline
    Ruperts Trooper's Avatar
    AOC Obsessed
    Join Date
    Dec 2005
    Posts
    1,471
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Lambda is the name given to the Air Ratio to indicate how far the actual, air-fuel mixture differs from the ideal, theoretical value (14.7:1).

    If lambda equals 1.000, the input air amount corresponds to the amount necessary in theory.

    If lambda is less than 1.000 the mixture is rich.

    If lambda is greater than 1.000, the mixture is lean.

    If lambda is greater than 1.300 the mixture is so lean that combustion can no longer take place.

    The above info courtesy of a Bosch Technical instruction Manual.

    Your lambda is at the 1.300 limit but I don't know what effect that'll have or how to cure it! Personally I'd be worried about long term engine damage through running very lean.
    Maintains:- Vectra Design 1.9CDTi
    Drives :- Hyundai Santa Fe


  8. #8
    Status
    Offline
    Teejay's Avatar
    AstraSport Member
    Join Date
    Sep 2005
    Posts
    6,383
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    surely I can adjust the fuel/air mixture somewhere on the engine??

    or does it need to be done by a 'map' ??
    0-60 in 6.5 secs and 48mpg- winner!

  9. #9
    Status
    Offline
    smokeydabear's Avatar
    AOC Fanatic
    Join Date
    May 2006
    Posts
    660
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    dont think you can adjust on the engine, its electronically controlled so only by map, or whatever is causing it to run lean on current map, which it shouldnt be
    Drives : Astra Mk4 1.8i 16v Sport
    Wanted : Coupe front Bumper (Cash Waiting!!)
    Wanted : Standard 1.8 airbox, will swap for K&N!

  10. #10
    Status
    Offline
    Teejay's Avatar
    AstraSport Member
    Join Date
    Sep 2005
    Posts
    6,383
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    That's a bit ghey

    Oh well, I'll see how much power I've lost since leaving the factory on Sat, then see what Thorney can do to fix it
    0-60 in 6.5 secs and 48mpg- winner!

Page 1 of 2 12 LastLast

Similar Threads

  1. astra progress, good news & bad news...
    By scrapheapchallenge in forum Astra Discussion & Chat
    Replies: 10
    Last Post: 31-07-2008, 11:42
  2. Good news/Bad news (wheels)
    By Teejay in forum Astra Discussion & Chat
    Replies: 28
    Last Post: 23-09-2006, 23:02

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •