blister Posted November 27, 2013 Report Share Posted November 27, 2013 My lupo gti failed its mot today due to very high emissions There where three emissions tests and mine failed all 3Iv cleaned the throttle bodyRan injector cleaner throughCars always From NEW always had shell VpowerFull service Oil catch tank Cleaned the breather pipes New lambdaGave it a good run before motI do have a Ashley manifold - 200 cell magnaflow cat and janspeed back box all of which are a few months oldHowever when I plug it into vagcom I get misfire on cylinder 1 why could this be! Quote Link to comment Share on other sites More sharing options...
Rich Posted November 27, 2013 Report Share Posted November 27, 2013 The misfire could be a multitude of things.If you've changed the cat/stuff & it has just failed it's first badly then that is the area you need to address.I assume the emissions light comes on/goes off ? (sometimes when the system fails it just doesn't light up at all) Quote Link to comment Share on other sites More sharing options...
Defcon5 Posted November 27, 2013 Report Share Posted November 27, 2013 (edited) Post up the emissions readingsWas the new lambda a proper one or el cheapo?Are magnaflow a good manufacturer of cats? Edited November 27, 2013 by Defcon5 Quote Link to comment Share on other sites More sharing options...
electricracer Posted November 27, 2013 Report Share Posted November 27, 2013 if you have a misfire it will fail on emissions its chucking unburnt fuel throughusual checks leads, injectors etcyou need to sort or it will kill your cat Quote Link to comment Share on other sites More sharing options...
blister Posted November 28, 2013 Author Report Share Posted November 28, 2013 Nope not had any lights flash up on the dashboard Plugged vagcom in and it just says misfire cylinder 1Sadly I don't have a print out of the emissions I was getting from the motIn my opinion magnaflow have always been brilliantIv ordered another coilpack and set of leads will get another set of sparkies and see if it cures the problem Quote Link to comment Share on other sites More sharing options...
GeoffD Posted November 28, 2013 Report Share Posted November 28, 2013 don't want any cat abuse on this forum, thank you. are you sure you have a misfire on cyl 1. you should be able to notice it. the manifold and backbox shouldn't make any difference, but the 200cell cat might have upset things a bit. I run a decat pipe and egr blanking but it hasn't upset my emmisions. sometimes its better to have all or nothing, in between sometimes isn't good for whatever reason. replace your coilpack .sparkplugs and leads one at a time then you will find out what it was. geoff Quote Link to comment Share on other sites More sharing options...
jon_273 Posted November 29, 2013 Report Share Posted November 29, 2013 I'd say it was caused by the manifold. The lambda sensor in the Ashley only takes it's readings from the exhaust gases from one cylinder, whereas on the standard manifold the Lambda sensor measures the combined gases from all cylinders. This causes strange things to happen like spurious fault codes... Quote Link to comment Share on other sites More sharing options...
GeoffD Posted November 29, 2013 Report Share Posted November 29, 2013 ahh, didn't know that. yes you may well be right about the lambda position. might be worth buying a new boss welding it somewhere more appropriate and blank the other one. ebay should sort you out. geoff Quote Link to comment Share on other sites More sharing options...
blister Posted May 16, 2014 Author Report Share Posted May 16, 2014 only just came back online today as i decided to to buy a vx220 in the near future and the lupo just isnt being usedanyways it turnt out to be the ashley manifold so i took it off and put it back to standard and the car now drives even better then before! and it passed its emmisions perfectly! Quote Link to comment Share on other sites More sharing options...
Defcon5 Posted May 16, 2014 Report Share Posted May 16, 2014 Good call by jon273 then! Quote Link to comment Share on other sites More sharing options...
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