FlorayG Posted July 31, 2013 Share Posted July 31, 2013 I just had a new distributor fitted cos my TDC sensor was bu**ered. I've been driving like a girl for about 4 weeks previous to this as I knew my car wasn't well. Now it runs just fine again but while I was in the garage i had the emissions checked and the CO is waaay high. I've got several possible reasons does anyone have any informed opinion please; 1) everything is just clogged up due to the TDC fault and it will get better now that is fixed (hope hope hope)2) my cat is no good - how can I test this? It's an aftermarket one. Fitted just prior to last year's MOT3) my mechanic thinks it's the O2 sensor but how do I check this? Should it show up as an engine management fault?(because that light has gone out at last) Anything else it might be? MOT in 4 weeks Thanks Quote Link to comment Share on other sites More sharing options...
Krzys Posted July 31, 2013 Share Posted July 31, 2013 An emissions test would tell you if the CAT was buggered but I doubt after just one year it would be unless something else has caused it. Probably take it for a few decent runs to clear it all out and stretch her legs too! See how you get on! Quote Link to comment Share on other sites More sharing options...
phill1975 Posted July 31, 2013 Share Posted July 31, 2013 I would say sensor has gone as normally when cat is faulty all emmisions readings are mile too high normaly. Quote Link to comment Share on other sites More sharing options...
Krzys Posted July 31, 2013 Share Posted July 31, 2013 I would say sensor has gone as normally when cat is faulty all emmisions readings are mile too high normaly.Plus the smell they make too! Eggy! Quote Link to comment Share on other sites More sharing options...
simpo Posted July 31, 2013 Share Posted July 31, 2013 I would say O2 sensor! Prob the original one. If u brought a cat last yeah prob not that but I have heard them fail a year later b4 Quote Link to comment Share on other sites More sharing options...
NIKH25 Posted July 31, 2013 Share Posted July 31, 2013 Just looking at your other post, you said you had you had a cel light on, is it still on? If so I'd definitely look at o2 sensor. Quote Link to comment Share on other sites More sharing options...
FlorayG Posted August 1, 2013 Author Share Posted August 1, 2013 Would a fault in the O2 sensor show as an engine management light on? (I think I already asked this...)Cos there is no light on now, so if so then it can't be that?If it is the O2 and that doesn't show up as a dash light then how can I be sure? Don't want to spend money I don't need to Quote Link to comment Share on other sites More sharing options...
Krzys Posted August 1, 2013 Share Posted August 1, 2013 I think it would throw the engine light up. If it's come and gone though could be on its way out? Quote Link to comment Share on other sites More sharing options...
FlorayG Posted August 1, 2013 Author Share Posted August 1, 2013 I think it would throw the engine light up. Does anyone know for sure? Quote Link to comment Share on other sites More sharing options...
NIKH25 Posted August 1, 2013 Share Posted August 1, 2013 Is vtec still operating or does it struggle under load?? Quote Link to comment Share on other sites More sharing options...
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