Exhaust System MOT failure

Discussion in '7th Generation (2003-2008) [Acura TSX]' started by StuH, Tuesday 18th Nov, 2014.

  1. StuH Top Contributor ★ ★ ★ ★ ☆

    United Kingdom Stuart Lancashire
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    :Messed:

    My 2.4 failed it's MOT, Lamda reading 1.04, limit is 0.97-1.03. Tried everything, cat cleaner, ran it for nearly an hour, put every electric on and it wouldn't budge. Other readings absolutely spot on. My man says it'll be the sensors, there's two one pre and one post Cat, Honda want the best part of £500 for the two :shock:

    I'm going to cry.
     
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  2. Ichiban Founder Staff Team

    England CJ Leeds
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    Take your car on the motorway and drive it in third gear higish revs for a few miles get the heat up no need for snake oil or new cats. Just do it then next day it will pass. Trust me.

    Another case Exhaust System - MoT failure !!!! Lambda sensor
     
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  3. StuH Top Contributor ★ ★ ★ ★ ☆

    United Kingdom Stuart Lancashire
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    It was run round for a good 30 mins, or should I say thrashed for a good 30 mins and then retested with the same results. How long should I take down the mway?
     
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  4. Old Cruiser Senior Member ★ ★ ☆ ☆ ☆

    pete slough
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    try changing the air filter and make sure there's no air leaks and breather pipes are all clear etc. in the pipe work to and from the air box.
    Cheers Pete
     
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  5. Ichiban Founder Staff Team

    England CJ Leeds
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    Take it to another MOT station you have been made to fail for some more work their way.
     
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  6. StuH Top Contributor ★ ★ ★ ★ ☆

    United Kingdom Stuart Lancashire
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    I'll have a look at the air filter and pipework but I don't think it's that old.

    Full results:
    Temp 60°

    Fast Idle
    RPM Actual 2572 Limit 2500-3000
    CO Actual 0.00% Limit 0.30
    HC Actual 23 ppm Limit 200
    Lambda Actual 1.05 Limit 0.97-1.03

    Second gast idle
    RPM Actual 2690 Limit 2500-3000
    CO Actual 0.00% Limit 0.30
    HC Actual 28 ppm Limit 200
    Lambda Actual 1.04 Limit 0.97 - 1.03

    The lad who looks after my car knows the garage well and he did say they tried and tried to get it through. I've only done about 1500m since the last MOT and apart from the odd 20 minute trip and a week in the lakes it's all been a few miles here and there.
     
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  7. Ichiban Founder Staff Team

    England CJ Leeds
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    Was the car roasting before the probe was put in?

    get some BP ultimate in the car and go to another station mate, the lack of use of the car will not help the cat and the sensors they are junked up. How old is the fuel in your tank?
     
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    Old Cruiser likes this.
  8. StuH Top Contributor ★ ★ ★ ★ ☆

    United Kingdom Stuart Lancashire
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    I don't know how warm it was other than the 60° it says on the results. I didn't take the car, my mate took it so I don't know what really went on.

    The fuel isn't that old and it's always run on Tesco Momentum99, I haven't used a standard fuel for years.
     
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  9. Chunkylover53 Club Veteran ★ ★ ★ ★ ★

    I fell for that marketing, I got an app that keeps detailed records of MPG and I usually add a little note after each fillup re performance and I noticed that standard Esso fuel was achieving higher MPG and seemed to be smoother.

    Mind you I've never tried BP ultimate but its the best fuel and probably worth a shot considering that you're looking at over £500 otherwise.

    Also try Cataclean - Civic had the same issue with emissions (CO) and with a full bottle combined with a half hour thrash the value fell from over 0.3 to 0.0x
     
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  10. StuH Top Contributor ★ ★ ★ ★ ☆

    United Kingdom Stuart Lancashire
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    Would a lambda sensor failure not bring the engine light on? What about codes?
     
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  11. Ichiban Founder Staff Team

    England CJ Leeds
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    Stu look at the readings bud they are just over those sensors are fine you need to give the car a proper Caning. You have to do this don't be asking someone else to do it. You will be wasting money on parts which are not required but if you have money to burn then fill up get the car to me and I will smoke it.
     
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  12. Ichiban Founder Staff Team

    England CJ Leeds
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    Sorry snake oils does w**k right foot floored does it.
     
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  13. StuH Top Contributor ★ ★ ★ ★ ☆

    United Kingdom Stuart Lancashire
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    Don't worry, Italian tune-up tomorrow, that v-tech will be getting a dam good work out :Niceone:
     
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  14. Bones126 Club Veteran ★ ★ ★ ★ ★

    England Dave Birmingham
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    I read in the hand book somewhere that you need to what Ichy is suggesting for this or a similar problem, I think it's a case of burning the crud off!
     
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  15. DeviateDefiant Co-Founder Staff Team

    United Kingdom Leo Northants
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    Just to echo @Ichiban's advise to use BP Ultimate, it's the only UK fuel without ethanol. I would personally get a tank full and fix with fuel cleaner like Tunap as well.

    Doubt there's anything wrong with your sensors bud, the readings are too close to normal. This is one of those scenarios where the car's just a bit gunked up from years of usage, there's likely nothing wrong but that alone is just pushing it very slightly out of the acceptable emissions range. Some fuel cleaner will help shift the crud, even if K24s rarely need it.