craig85 Posted June 2, 2015 Share Posted June 2, 2015 I took the Supra for it's first MOT with me today and surprise, surprise it failed on emissions Fast idle 1 - CO 0.83% (0.3% max) Fast idle 2 - CO 0.85% Natural idle went through ok at bang on 0.5% Anyway, my current exhaust is one piece from the 1st decat so it looks like I'll need either a 1st cat or a 2nd cat and cat back exhaust; with these readings is it likely that I could get through with one cat fitted or will both be needed? Quote Link to comment Share on other sites More sharing options...
Benjy Posted June 2, 2015 Share Posted June 2, 2015 The search button is your friend. What are the details of your car? Age? Turbo or NA? Quote Link to comment Share on other sites More sharing options...
craig85 Posted June 2, 2015 Author Share Posted June 2, 2015 The search button is your friend. What are the details of your car? Age? Turbo or NA? I have tried searching but there isn't a great deal I can find since the last major update of the MOT test, I had to use catalytic as a search term as both cat and mot are too short. Completely forgot about the spec though! It's a 1993 TT6 with BPU - Apexi Power FC ECU, full decat and a Blitz boost controller. Quote Link to comment Share on other sites More sharing options...
supra900bhp Posted June 2, 2015 Share Posted June 2, 2015 My J spec as gone through last 3 with no cats at all with hks super dragger on a k 93 TT auto they do a slow and fast idol test as it don't come in to newer rules so they tell me so long as stays in the green it's all good Last mot was a infrared gas analyser emission test Natural idle test = pass Fast idle test = pass Lambda test 0.97/1.03 = 1.00 pass Co2 under 0.20 = 0.13 pass H/C under 00200 = 00018 pass Hope I don't have probs with next one or I will be looking for mot cats to lol Quote Link to comment Share on other sites More sharing options...
Pudsey Posted June 2, 2015 Share Posted June 2, 2015 (edited) This seems to be a continual problem. My understanding is this. If a vehicle can't be exactly matched in the emissions database, then a non cat test should be performed. This is the case for vehicles from 1st August 1992 to 31st July 1995. For vehicles registered between 1st August 1995 to 31st August 2002 - same although use default limits. There is a flow diagram, and it simply will direct you to the test to carry out. http://www.motinfo.gov.uk/htdocs/m4s07000309.htm UK Supra's will be in the database, and Japanese imports will not. If an exact match cannot be determined by serial number, vin detail, engine number etc etc, a none catalytic convertor test should be performed or one within default limits based on year of manufacture. Edited June 2, 2015 by Pudsey link added (see edit history) Quote Link to comment Share on other sites More sharing options...
craig85 Posted June 2, 2015 Author Share Posted June 2, 2015 If that's the case then the annex used is incorrect as this shows the JDM Supra judging by the vin numbers in question on this screenshot from it http://images.tapatalk-cdn.com/15/06/02/20a2cafb8e33559db2fbd2b2f6866c31.jpg Quote Link to comment Share on other sites More sharing options...
Pudsey Posted June 2, 2015 Share Posted June 2, 2015 I am pretty sure you are looking at the UK Supra's. The japanese imports will not be in the database, as they were never sold in this country. It will pull up a UK Supra 2JZ GTE, but the japanese import is not the same. Different turbos, injectors, no EGR to name a few of the differences an import has. I am sure an expert will be along shortly. Quote Link to comment Share on other sites More sharing options...
robin Posted June 2, 2015 Share Posted June 2, 2015 I have a UK supra with only one cat in it, the originals failed and Toyota wanted £1200 or so and I ended up with a single generic on welded in and it passes every year as long as the cat is hot enough, maybe take it for a big run then drop it in for the test? Quote Link to comment Share on other sites More sharing options...
themodifiedkid Posted June 2, 2015 Share Posted June 2, 2015 The latest I heard with mots is if it was manufactured with a cat then it has to have one in for mot for it to even stand a chance in passing. I'm fully decated and find that just putting the second cat back on for mot is fine. Although I'm sure they have difference rules at different mot stations. I suppose it depends on how leanient ur mot tester is. I even had to put my cat back on my l200 animal which is bizarre as its a diesel!!! Quote Link to comment Share on other sites More sharing options...
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