Hi, this is my first post, I appreciate there are a lot like this but I've already changed my O2 sensors!
Had my Clio for a couple years now. Last summer I fitted a Miltek system and a decat. In the last 6 months I have replaced both lamda sensors pre and post cat.
Occasionally if I'm in traffic or whatever the car throws up the EML and it's always used to be the post cat lamda sensor as you'd expect. This fault clears in a day or so and the light goes out.
Recently the car has been smelling really rich. Took it to a garage and the CO and HC are through the roof, even for a decated car... 9% HC! Car runs smoothly high up revs, no misfires, lumpy on over run, maybe slightly lumpy at idle but it always has been and the average fuel consuption has dropped too. Something isn't 100% but I don't know where to look.
Don't really know where to go next? Open to any ideas?
Matt
Had my Clio for a couple years now. Last summer I fitted a Miltek system and a decat. In the last 6 months I have replaced both lamda sensors pre and post cat.
Occasionally if I'm in traffic or whatever the car throws up the EML and it's always used to be the post cat lamda sensor as you'd expect. This fault clears in a day or so and the light goes out.
Recently the car has been smelling really rich. Took it to a garage and the CO and HC are through the roof, even for a decated car... 9% HC! Car runs smoothly high up revs, no misfires, lumpy on over run, maybe slightly lumpy at idle but it always has been and the average fuel consuption has dropped too. Something isn't 100% but I don't know where to look.
Don't really know where to go next? Open to any ideas?
Matt