citroen zx 1.4 p reg /magnetti marelliArchived Message
Posted by c burgess on August 10, 2007, 6:37 pm
Mot emissions failure. Been losing sleep on this one.
At idle co .57% fast idle co.63% hc 135 o2 70 lambda 1.008 afr 14.83
Lambda sensor seems to be switching correctly, no obvious air leaks, tested around throttle body & map sensor, known points. Switched 02 sensor with known good unit. Live data on Autodiagnos shows switching. No exhaust leaks. Cat was in reasonably good condition, did a pre/post cat test no difference on CO across the cat. Switched with known good unit. No change. Tried removing battery in case of any stored adaptions.