Fathead87 Posted October 14, 2012 Share Posted October 14, 2012 hi put my car through an MOT and it failed on CO2 0.34% on fast idle test. not to much over.thought it was the cat so i replaced it. put it back on the machine a few days later and it was worse.1.40% took it for a run then 0.84%. it also has a problem where the revs will not hold steady. example hold throttle at 2k and the revs rise and fall 500rpmany ideas.thankyou muchly Quote Link to comment Share on other sites More sharing options...
knight Posted October 14, 2012 Share Posted October 14, 2012 o2 sensor mate mine done the same! replaced all was good Quote Link to comment Share on other sites More sharing options...
Fathead87 Posted October 14, 2012 Author Share Posted October 14, 2012 cheers love gonna give that a go. where did you get your from? they aint cheep. Quote Link to comment Share on other sites More sharing options...
knight Posted October 15, 2012 Share Posted October 15, 2012 motor factors place, got mine for £89 not fitted Quote Link to comment Share on other sites More sharing options...
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